KB-XXXX Editing Target or Permissions for a Portal channel fails with a "The system has encountered a problem" error

Symptom

When attempting to open the Target or Permissions settings for a Portal channel, the following error is observed:

The system has encountered a problem
We're sorry! A problem occurred while processing your last request.
Please contact the system administrator for more information.

In the application server log, the following error is observed:

10:41:06,858 INFO  [stdout] (ajp-/0.0.0.0:8009-24) 2018-10-11 10:41:06,857 [ajp-/0.0.0.0:8009-24] ERROR com.appiancorp.ap2.WrapFilter - java.lang.NullPointerException
10:41:06,858 INFO  [stdout] (ajp-/0.0.0.0:8009-24) java.lang.NullPointerException
10:41:06,858 INFO  [stdout] (ajp-/0.0.0.0:8009-24)      at com.appiancorp.security.BlockPortletFilter.doFilter(Unknown Source)
10:41:06,858 INFO  [stdout] (ajp-/0.0.0.0:8009-24)      at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
...

Cause

This issue is caused by a bug in the appian.system.block-portlet-1.0.0.jar plugin, which makes it incompatible with recent updates to Appian.

Action

Before proceeding, ensure your environment is running the following hotfix package/version or a later one. Appian recommmends always applying the latest hotfix package as soon as one becomes available.

• Appian 18.4 or later
• Appian 18.3 Hotfix Package C
• Appian 18.2 Hotfix Package F
• Appian 18.1 Hotfix Package H
• Appian 17.4 Hotfix Package L
• Appian 17.3 Hotfix Package M
• Appian 17.2 Hotfix Package P

Once your environment is running an appropriate hotfix/version, undeploy the appian.system.block-portlet-1.0.0.jar plugin.

Affected Versions

This article applies to Appian 17.2 and later.

Last Reviewed: April 2019