After deploying a theme from a '.jar' file, Red Hat Single Sign-On (RH SSO) is returning a 'NullPointerException' error

Solution Verified - Updated -

Issue

Unable to login to the RH SSO Web Admin Portal after deploying a theme from a .jar file. The error returned is:

ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-11) Uncaught server error: java.lang.NullPointerException
at org.keycloak.theme.DefaultThemeManager$ExtendingTheme.getProperties(DefaultThemeManager.java:283)

...

at org.xnio.XnioWorker$WorkerThreadFactory$1$1.run(XnioWorker.java:1282)
at java.lang.Thread.run(Thread.java:748)

Environment

  • Red Hat Single Sign-On (RH SSO)
    • 7.X

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