An Object is missing from the Application or Control Panel menu after restarting

Issue

• A custom Object configured to display in the Application or Control Panel menu is missing after restarting the application.
• The custom Object was previously present with Update 49 installed, but has now disappeared.
1. Go to Control Panel > Objects
2. Create an object definition
3. Add a field to it
4. For Panel Category Key select Applications > Content
5. Publish the object definition
   Check Point: You see the object portlet under Applications > Content
6. Restart
• The following error is generated in the logs:
  

  java.lang.IllegalArgumentException: Portlet is null
          at 
  com.liferay.object.web.internal.object.entries.application.list.ObjectEntriesPanelApp.<init>(ObjectEntriesPanelApp.java:46) ~[?:?]

Environment

• DXP 7.4 Update 49

Resolution

• This is a known issue with Update 49 and is resolved with Update 50.
• Updating to Update 50 will resolve this issue.
• LPS-167822