Forbidden - cannot change realm settings as admin

It’s been some time since I needed to change realm settings and I likely updated keycloak from version 11 to 15 since the last time. Now I need to update the email client but the admin console returns forbidden when I try. I also cannot change the realm display text.

Anyone have an idea if I’m missing a permission or something? This system is deployed as a docker image on kubernetes, version 15.0.

An update to this, not sure if relevant, but there is an error showing in the console:

2021-08-19T18:02:29.843545894Z e[0me[31m18:02:29,842 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-183) Uncaught server error: java.io.IOException: UT000128: Remote peer closed connection before all data could be read
2021-08-19T18:02:29.843643132Z 	at io.undertow.core@2.2.5.Final//io.undertow.conduits.FixedLengthStreamSourceConduit.exitRead(FixedLengthStreamSourceConduit.java:338)
2021-08-19T18:02:29.843657299Z 	at io.undertow.core@2.2.5.Final//io.undertow.conduits.FixedLengthStreamSourceConduit.read(FixedLengthStreamSourceConduit.java:255)
2021-08-19T18:02:29.843665346Z 	at org.jboss.xnio@3.8.4.Final//org.xnio.conduits.ConduitStreamSourceChannel.read(ConduitStreamSourceChannel.java:127)
2021-08-19T18:02:29.843675067Z 	at io.undertow.core@2.2.5.Final//io.undertow.channels.DetachableStreamSourceChannel.read(DetachableStreamSourceChannel.java:209)
2021-08-19T18:02:29.843681515Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.HttpServerExchange$ReadDispatchChannel.read(HttpServerExchange.java:2419)
2021-08-19T18:02:29.843701212Z 	at org.jboss.xnio@3.8.4.Final//org.xnio.channels.Channels.readBlocking(Channels.java:344)
2021-08-19T18:02:29.843708957Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.spec.ServletInputStreamImpl.readIntoBuffer(ServletInputStreamImpl.java:201)
2021-08-19T18:02:29.843716608Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.spec.ServletInputStreamImpl.read(ServletInputStreamImpl.java:177)
2021-08-19T18:02:29.843723851Z 	at com.fasterxml.jackson.core.jackson-core@2.12.1//com.fasterxml.jackson.core.json.ByteSourceJsonBootstrapper.ensureLoaded(ByteSourceJsonBootstrapper.java:539)
2021-08-19T18:02:29.843732196Z 	at com.fasterxml.jackson.core.jackson-core@2.12.1//com.fasterxml.jackson.core.json.ByteSourceJsonBootstrapper.detectEncoding(ByteSourceJsonBootstrapper.java:133)
2021-08-19T18:02:29.843738448Z 	at com.fasterxml.jackson.core.jackson-core@2.12.1//com.fasterxml.jackson.core.json.ByteSourceJsonBootstrapper.constructParser(ByteSourceJsonBootstrapper.java:256)
2021-08-19T18:02:29.843744884Z 	at com.fasterxml.jackson.core.jackson-core@2.12.1//com.fasterxml.jackson.core.JsonFactory._createParser(JsonFactory.java:1656)
2021-08-19T18:02:29.843751173Z 	at com.fasterxml.jackson.core.jackson-core@2.12.1//com.fasterxml.jackson.core.JsonFactory.createParser(JsonFactory.java:1085)
2021-08-19T18:02:29.843758213Z 	at com.fasterxml.jackson.jaxrs.jackson-jaxrs-json-provider@2.12.1//com.fasterxml.jackson.jaxrs.base.ProviderBase._createParser(ProviderBase.java:830)
2021-08-19T18:02:29.843803474Z 	at org.jboss.resteasy.resteasy-jackson2-provider@3.15.1.Final//org.jboss.resteasy.plugins.providers.jackson.ResteasyJackson2Provider.readFrom(ResteasyJackson2Provider.java:177)
2021-08-19T18:02:29.843810974Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.readFrom(AbstractReaderInterceptorContext.java:66)
2021-08-19T18:02:29.843817016Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.ServerReaderInterceptorContext.readFrom(ServerReaderInterceptorContext.java:61)
2021-08-19T18:02:29.843822500Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:56)
2021-08-19T18:02:29.843827891Z 	at org.jboss.resteasy.resteasy-crypto@3.15.1.Final//org.jboss.resteasy.security.doseta.DigitalVerificationInterceptor.aroundReadFrom(DigitalVerificationInterceptor.java:36)
2021-08-19T18:02:29.843833711Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(AbstractReaderInterceptorContext.java:59)
2021-08-19T18:02:29.843839503Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.MessageBodyParameterInjector.inject(MessageBodyParameterInjector.java:198)
2021-08-19T18:02:29.843845209Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.MethodInjectorImpl.injectArguments(MethodInjectorImpl.java:91)
2021-08-19T18:02:29.843850920Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:113)
2021-08-19T18:02:29.843857129Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:546)
2021-08-19T18:02:29.843862257Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:435)
2021-08-19T18:02:29.843867860Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:396)
2021-08-19T18:02:29.843901839Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
2021-08-19T18:02:29.843912106Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:398)
2021-08-19T18:02:29.843917477Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:365)
2021-08-19T18:02:29.843923421Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:150)
2021-08-19T18:02:29.843929024Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:110)
2021-08-19T18:02:29.843937823Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:141)
2021-08-19T18:02:29.843944017Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:104)
2021-08-19T18:02:29.843976626Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:440)
2021-08-19T18:02:29.843983448Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:229)
2021-08-19T18:02:29.843999006Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:135)
2021-08-19T18:02:29.844004949Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
2021-08-19T18:02:29.844010565Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:138)
2021-08-19T18:02:29.844015900Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:215)
2021-08-19T18:02:29.844022188Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:245)
2021-08-19T18:02:29.844028503Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:61)
2021-08-19T18:02:29.844047480Z 	at org.jboss.resteasy.resteasy-jaxrs@3.15.1.Final//org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
2021-08-19T18:02:29.844053927Z 	at javax.servlet.api@2.0.0.Final//javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
2021-08-19T18:02:29.844060629Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
2021-08-19T18:02:29.844066940Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
2021-08-19T18:02:29.844073491Z 	at org.keycloak.keycloak-wildfly-extensions@15.0.0//org.keycloak.provider.wildfly.WildFlyRequestFilter.lambda$doFilter$0(WildFlyRequestFilter.java:41)
2021-08-19T18:02:29.844078892Z 	at org.keycloak.keycloak-services@15.0.0//org.keycloak.services.filters.AbstractRequestFilter.filter(AbstractRequestFilter.java:43)
2021-08-19T18:02:29.844084994Z 	at org.keycloak.keycloak-wildfly-extensions@15.0.0//org.keycloak.provider.wildfly.WildFlyRequestFilter.doFilter(WildFlyRequestFilter.java:39)
2021-08-19T18:02:29.844091135Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
2021-08-19T18:02:29.844097393Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
2021-08-19T18:02:29.844103539Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
2021-08-19T18:02:29.844109220Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
2021-08-19T18:02:29.844126748Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
2021-08-19T18:02:29.844132474Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
2021-08-19T18:02:29.844144686Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
2021-08-19T18:02:29.844150527Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2021-08-19T18:02:29.844156867Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
2021-08-19T18:02:29.844163282Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:117)
2021-08-19T18:02:29.844177163Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
2021-08-19T18:02:29.844183965Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2021-08-19T18:02:29.844190311Z 	at io.undertow.core@2.2.5.Final//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
2021-08-19T18:02:29.844211196Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
2021-08-19T18:02:29.844217797Z 	at io.undertow.core@2.2.5.Final//io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
2021-08-19T18:02:29.844245790Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
2021-08-19T18:02:29.844255274Z 	at io.undertow.core@2.2.5.Final//io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
2021-08-19T18:02:29.844260860Z 	at io.undertow.core@2.2.5.Final//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
2021-08-19T18:02:29.844266992Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2021-08-19T18:02:29.844272969Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
2021-08-19T18:02:29.844280381Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2021-08-19T18:02:29.844288394Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
2021-08-19T18:02:29.844294909Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.SendErrorPageHandler.handleRequest(SendErrorPageHandler.java:52)
2021-08-19T18:02:29.844300775Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
2021-08-19T18:02:29.844306517Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
2021-08-19T18:02:29.844340803Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
2021-08-19T18:02:29.844351428Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
2021-08-19T18:02:29.844357097Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
2021-08-19T18:02:29.844362411Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
2021-08-19T18:02:29.844368368Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
2021-08-19T18:02:29.844373763Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
2021-08-19T18:02:29.844379917Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
2021-08-19T18:02:29.844416291Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
2021-08-19T18:02:29.844438303Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
2021-08-19T18:02:29.844444271Z 	at org.wildfly.extension.undertow@23.0.2.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1530)
2021-08-19T18:02:29.844451272Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
2021-08-19T18:02:29.844458082Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
2021-08-19T18:02:29.844463639Z 	at io.undertow.servlet@2.2.5.Final//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
2021-08-19T18:02:29.844470121Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.Connectors.executeRootHandler(Connectors.java:387)
2021-08-19T18:02:29.844475515Z 	at io.undertow.core@2.2.5.Final//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:841)
2021-08-19T18:02:29.844480606Z 	at org.jboss.threads@2.4.0.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
2021-08-19T18:02:29.844505503Z 	at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
2021-08-19T18:02:29.844511438Z 	at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
2021-08-19T18:02:29.844516880Z 	at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
2021-08-19T18:02:29.844523209Z 	at org.jboss.xnio@3.8.4.Final//org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1280)
2021-08-19T18:02:29.844529381Z 	at java.base/java.lang.Thread.run(Thread.java:829)
2021-08-19T18:02:29.844534205Z