SAML error: uriTemplate parameter is null

Hello!

I have keycloak configured to offer SAML2 auth endpoint for my Synology Directory Server. LDAP login is working fine and I’m able to successfully auth via SAML to a third party application, however when I try to logout from the third party application, I get a generic error in the web page and the below stack trace in KeyCloak. I’m almost certain that this error is indicating that something I should have configured must have been left null on accident, but I cannot locate what feature uriTemplate might be that I should configure. searching for this error on google doesn’t provide a lot of keycloak-specific info.

Thanks in advance for any help you can provide!

Error:

22:51:38,510 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-21) Uncaught server error: java.lang.RuntimeException: java.lang.IllegalArgumentException: uriTemplate parameter is null
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.SamlService$BindingProtocol.logoutRequest(SamlService.java:500)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.SamlService$BindingProtocol.handleSamlRequest(SamlService.java:269)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.SamlService$BindingProtocol.execute(SamlService.java:517)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.SamlService.redirectBinding(SamlService.java:604)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:138)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:526)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:415)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:376)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:356)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:378)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:347)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:150)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:104)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:440)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:229)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:135)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:356)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:138)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:215)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:227)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
        at org.jboss.resteasy.resteasy-jaxrs@3.11.0.Final//org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
        at javax.servlet.api@2.0.0.Final//javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:91)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletChain$1.handleRequest(ServletChain.java:68)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
        at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.RedirectDirHandler.handleRequest(RedirectDirHandler.java:68)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:132)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
        at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.core@2.0.30.Final//io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
        at io.undertow.core@2.0.30.Final//io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
        at io.undertow.core@2.0.30.Final//io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
        at io.undertow.core@2.0.30.Final//io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
        at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
        at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
        at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:269)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:78)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:133)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:130)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1541)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1541)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1541)
        at org.wildfly.extension.undertow@19.0.0.Final//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1541)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:249)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:78)
        at io.undertow.servlet@2.0.30.Final//io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:99)
        at io.undertow.core@2.0.30.Final//io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
        at io.undertow.core@2.0.30.Final//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
        at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
        at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
        at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
        at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
        at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.IllegalArgumentException: uriTemplate parameter is null
        at org.keycloak.keycloak-common@10.0.0//org.keycloak.common.util.KeycloakUriBuilder.uriTemplate(KeycloakUriBuilder.java:132)
        at org.keycloak.keycloak-common@10.0.0//org.keycloak.common.util.KeycloakUriBuilder.uri(KeycloakUriBuilder.java:190)
        at org.keycloak.keycloak-common@10.0.0//org.keycloak.common.util.KeycloakUriBuilder.fromUri(KeycloakUriBuilder.java:52)
        at org.keycloak.keycloak-saml-core@10.0.0//org.keycloak.saml.BaseSAML2BindingBuilder.generateRedirectUri(BaseSAML2BindingBuilder.java:358)
        at org.keycloak.keycloak-saml-core@10.0.0//org.keycloak.saml.BaseSAML2BindingBuilder$BaseRedirectBindingBuilder.generateURI(BaseSAML2BindingBuilder.java:202)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.JaxrsSAML2BindingBuilder$RedirectBindingBuilder.response(JaxrsSAML2BindingBuilder.java:87)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.JaxrsSAML2BindingBuilder$RedirectBindingBuilder.response(JaxrsSAML2BindingBuilder.java:79)
        at org.keycloak.keycloak-services@10.0.0//org.keycloak.protocol.saml.SamlService$BindingProtocol.logoutRequest(SamlService.java:497)
        ... 73 more
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