Facing freemarker.core.InvalidReferenceException in ftl file for themes

Solution Unverified - Updated -

Issue

  • I get Failed to create error page: org.keycloak.theme.FreeMarkerException: Failed to process template page.ftl, when, this URI is called /auth/realms/<realm>/foo:
2020-06-01 09:32:06,841 ERROR [freemarker.runtime] (default task-22) Error executing FreeMarker template: freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> customVariable.field  [in template "page.ftl" at line 9, column 38]

Environment

  • Red Hat Single Sign On(RH-SSO)
    • 7
  • Red Hat Build Keycloak(RHBK)
    • All version

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