I'm getting this Error 401: Unathorized errors in the admin interface. I work for a minute or two in the application and get the error, log out of the application/refresh browser and after one or two minutes happens again. It is quite annoying. This happens in IE, Chrome and Firefox

Checking the server logs i see this exception:

2015-08-06 10:50:19,297 ERROR [org.keycloak.adapters.BearerTokenRequestAuthenticator] (default task-4) Failed to verify token: org.keycloak.VerificationException: Token
is not active.
at org.keycloak.RSATokenVerifier.verifyToken(RSATokenVerifier.java:43) [keycloak-core-1.0.5.Final.jar:]
at org.keycloak.RSATokenVerifier.verifyToken(RSATokenVerifier.java:16) [keycloak-core-1.0.5.Final.jar:]
at org.keycloak.adapters.BearerTokenRequestAuthenticator.authenticate(BearerTokenRequestAuthenticator.java:63) [keycloak-adapter-core-1.0.5.Final.jar:]
at org.keycloak.adapters.RequestAuthenticator.authenticate(RequestAuthenticator.java:41) [keycloak-adapter-core-1.0.5.Final.jar:]
at org.keycloak.adapters.undertow.UndertowKeycloakAuthMech.keycloakAuthenticate(UndertowKeycloakAuthMech.java:82) [keycloak-undertow-adapter-1.0.5.Final.jar:]
at org.keycloak.adapters.undertow.ServletKeycloakAuthMech.authenticate(ServletKeycloakAuthMech.java:61) [keycloak-undertow-adapter-1.0.5.Final.jar:]
…
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:283) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:300) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.access$100(SecurityContextImpl.java:270) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl.attemptAuthentication(SecurityContextImpl.java:133) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl.authTransition(SecurityContextImpl.java:108) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl.authenticate(SecurityContextImpl.java:101) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
…
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at org.keycloak.adapters.undertow.ServletPreAuthActionsHandler.handleRequest(ServletPreAuthActionsHandler.java:69) [keycloak-undertow-adapter-1.0.5.Final.jar:]
at org.keycloak.adapters.undertow.ServletPreAuthActionsHandler.handleRequest(ServletPreAuthActionsHandler.java:69) [keycloak-undertow-adapter-1.0.5.Final.jar:]
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:248) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:77) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:167) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:761) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_51]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_51]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_51]

2015-08-06 10:51:51,799 ERROR [org.keycloak.adapters.BearerTokenRequestAuthenticator] (default task-14) Failed to verify token: org.keycloak.VerificationException: Token is not active.
at org.keycloak.RSATokenVerifier.verifyToken(RSATokenVerifier.java:43) [keycloak-core-1.0.5.Final.jar:]
at org.keycloak.RSATokenVerifier.verifyToken(RSATokenVerifier.java:16) [keycloak-core-1.0.5.Final.jar:]
at org.keycloak.adapters.BearerTokenRequestAuthenticator.authenticate(BearerTokenRequestAuthenticator.java:63) [keycloak-adapter-core-1.0.5.Final.jar:]
at org.keycloak.adapters.RequestAuthenticator.authenticate(RequestAuthenticator.java:41) [keycloak-adapter-core-1.0.5.Final.jar:]
at org.keycloak.adapters.undertow.UndertowKeycloakAuthMech.keycloakAuthenticate(UndertowKeycloakAuthMech.java:82) [keycloak-undertow-adapter-1.0.5.Final.jar:]
at org.keycloak.adapters.undertow.ServletKeycloakAuthMech.authenticate(ServletKeycloakAuthMech.java:61) [keycloak-undertow-adapter-1.0.5.Final.jar:]
…
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:283) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:300) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.access$100(SecurityContextImpl.java:270) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl.attemptAuthentication(SecurityContextImpl.java:133) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl.authTransition(SecurityContextImpl.java:108) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.security.impl.SecurityContextImpl.authenticate(SecurityContextImpl.java:101) [undertow-core-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55) [undertow-servlet-1.1.8.Final.jar:1.1.8.Final]
at io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33) [undertow-core-1.1.8.Final.jar:1.1.8.Final]