Check to see if there are any folders in this location C:\Users\yourname\AppData\Local\Packages\Microsoft.MoCamera_cw5n1h2txyewy there should be 7 folders.
AC, LocalCache, LocalState, RoamingState, Settings, SystemAppData, TempState
If not copy and paste them from another app folder i.e C:\Users\yourname\AppData\Local\Packages\Microsoft.Reader for example itll have the same folders but contains different data. For some reason something had erased all those folders and wouldn't recreate them hope this helps and works it did for me.