I have recently installed IntelliJ IDEA 13.1.4 and the jRebel plugin. I have licensed it ok and created and added configurations in catalina.bat
file.
When
What worked for me was deleting the .idea folder and importing the project again.
Just create another folder, which will mark the directory as Sources Root and move your executable file into this folder.
This can be fixed by invalidating the cache.
On the main menu, choose File -> Invalidate Caches/Restart.
Source