Error "class wt.workflow.work.WorkItem cannot be cast to class wt.fc.adminlock.AdministrativelyLockable" in Windchill PDMLink 12.0

• Error class wt.workflow.work.WorkItem cannot be cast to class wt.fc.adminlock.AdministrativelyLockable while launching Part Structure page from View Rule Conflict of a Promotion Request
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• Error in the Windchill UI while opening the Part Structure Tab from a Light Box of a View Rule Conflicts link:

The GetConfigurationOperation failed.
class wt.workflow.work.WorkItem cannot be cast to class wt.fc.adminlock.AdministrativelyLockable (wt.workflow.work.WorkItem and wt.fc.adminlock.AdministrativelyLockable are in unnamed module of loader 'app')

• Error thrown in the Method Server Log while launching the Part Structure Tag from View Rule Conflict of a Promotion Request

2022-06-20 11:29:25,789 ERROR [ajp-nio-127.0.0.1-8010-exec-8] com.ptc.cat.config.server.AbstractComponentConfigBuilder wcadmin - Error getting table config based on table views with session locale 'en_US' java.lang.NullPointerException
	at com.ptc.windchill.enterprise.part.psb.server.PSBTreeConfigBuilder.isInlineEditingEnabled(PSBTreeConfigBuilder.java:193)
	at com.ptc.windchill.enterprise.part.psb.server.PSBTreeConfigBuilder.getColumnConfigOverrides(PSBTreeConfigBuilder.java:394)
	at com.ptc.cat.config.server.AbstractComponentConfigBuilder.getTableConfigBasedOnTableViews(AbstractComponentConfigBuilder.java:643)
	at com.ptc.cat.config.server.AbstractComponentConfigBuilder._getTableConfigBasedOnTableViews(AbstractComponentConfigBuilder.java:617)
	at com.ptc.cat.config.server.AbstractComponentConfigBuilder.buildComponentConfig(AbstractComponentConfigBuilder.java:363)
	at com.ptc.windchill.enterprise.part.psb.server.PSBTreeConfigBuilder.buildComponentConfig(PSBTreeConfigBuilder.java:690)
	at com.ptc.cat.ops.server.internal.GetConfigurationOperation.buildConfig(GetConfigurationOperation.java:183)
	at com.ptc.cat.ops.server.internal.GetConfigurationOperation.run(GetConfigurationOperation.java:119)
	at com.ptc.cat.ops.server.DefaultOperationDispatcher.dispatch(DefaultOperationDispatcher.java:155)

• Error when navigating to WTPart Structure Tab from the View Rule Conflicts