Sometime the JSP classes will not get compiled automatically in Adobe Experience Manager(AEM). Strange UI issues can compilation errors may be seen in the logs.
Recompiling the JSP classes with steps below wil resolve many of such issues:
- Login via the AEM System Console http://hos:port/system/console/slingjsp
- Click on Recompile all JSPs
- Log via CRXDE Lite
- Browse to /var/clientlibs
- Delete all contents under /var/clientlibs with the exception of rep:policy
- Click Save All.