I have the Sony Experia T and have been using MPE for many years. However, I have just upgraded from Ice Cream Sandwich to Jelly Bean and since then, when starting a mullti-sync, I get an error message when the sync process reaches the "Refresh file lists" part.
The error message is as follows:
"SetPath failed: \phone\sdcard1\
OBEX Errorcode: C4 - Not Found"

When going to Files menu in MPE I can view External storage, Memory card, System Storage and Applications although I have had a problem with accessing the External storage. I can see the folder structure, but when I want to open it, it crashes MPE without any error message.
I can access other storage directories fine (Memory card, System Storage and Applications)