Can't upload or delete thumbnails on my main game, but can on others

While I can upload and delete thumbnails from my other games, I cannot do so on this one Innovation Labs - Roblox
I can select a file to upload (a png image), and it will appear next to the Choose File button. However clicking ‘Upload’ results in nothing happening, it simply doesn’t respond at all. Same with clicking the little delete cross in the corner of existing thumbnails: I can move and drag the thumbnails around but clicking the cross does nothing.
I am using Google Chrome on Windows 10. The problem has persisted for 24 hours now.

3 Likes

Try using Firefox, or Microsoft Edge.