I have been trying to upload my game three times but each time I got a notification saying the build failed to process.

I have followed the instructions and downloaded butler, then used the command:
butler push "C:\MeadowOfDreams\Meadow of Dreams" draakhex/meadow-of-dreams:win
It starts to upload, once it is done, it says "Build is now processing, should be up in a bit (see `butler status`)".
However, shortly after, I get the notification warning me that it failed to process.

The page of the game is currently a draft, the directory (Meadow of dreams) contained the unity structure (Exe, dll, and the data folder).
I also tried to upload a single ZIP containing everything.
The game I am trying to upload weights 2.1GB (A bit over 800MB when zipped).

Can someone guide me on how to fix this problem?
Thank you!