when I try to upload it to gd.games, it comes for a long time and then it shows up an error 500 code

When uploading your game to gd.games, it's important to check your internet connection speed, and the size of your game. Games that are too large will definitely have a harder time being uploaded to any hosting platform because of how long it takes to upload the game.

But can you try again and share a screenshot of the full error message?

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... 

At end, it worked :)