Can't upload web game to Itch

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:bust_in_silhouette: Asked By SingingApple

I recently created a web game using Godot. I thought about uploading it to Itch ( https://itch.io ). But it says that there was a problem completing the upload.
I had exported my game with debugging disabled. I renamed the main html file to index.html. I used XAMMP (here) to test my game and it runs as expected. I then compressed the exported files using 7-zip. But I can’t seem to upload it. I have tried like ten times.
Has anyone got such an error before? Any tips?