To put it simply, the Apache Error 404 occurs whenever I try to log into planning. I suspect that it is due to a process called EssbaseVR that usually appears with the processes list but it is now missing. Usually, it starts whenever I start the EPM services but now it simply doesn't show up.
Closing and starting essbase all over again didn't work.
Closing and starting Essbase Integration (Web Logic) didn't work.