Sorry about that!
Are you using a Chromebook by any chance?
If you're able to access the dev tools and can tell me if there is an error in the console that'd be a big help!
Can you try this version and send me the error you get?
https://www.kodub.com/test/chromebook-test/
Are you playing on a school network by the way? Do you get the same error if you try it at home?
Maybe your school's network is blocking some game assets from loading