I am having same problem right now
Alright, maybe something is wrong with itch.io right now then. That would make me feel so much better.
Looks like problem with uploading project file. New project file is not saved. For my old project I can only use already uplaoaded files. New file is not saved. I cant even delete old files.
So I uploaded from dropbox and it worked that way.
I AM SORRY TRY UPLOADING IT FROM DROPBOX. GIVE ANOTHER COMMENT IF THIS DOES NOT HELP.
Sorry about the trouble, there was a site wide issue. It has been fixed now, tell us if you are still experiencing any problems. Thanks
I AM VERY SORRY I WILL TRY TO FIX IT.