i do have the same problem on the gdevelop export...
bild log text: Error: The uploaded zip file does not exist, the upload of the build seems to have failed.
I did manage to get the short version of the game to work on brosewr on the itch.io site, and also i put there the full game. but if server of gdevelop are full, can be update the games on gdevelop after deatline? like i will not touch the one in itch.io, because it works, but the other one no, and its not exporting... i will keep trying anyways...