WebGL gets stuck at 90% loading

I am not able to get my game running with WebGL anymore. It either gets stuck at 90% and the browser stops working (CPU usage at 100% but unresponsive tab -- Chrome asks me whether I want to kill or wait).
In my partner's laptop , same OS , we get "Memory out of bound".
I can't get any debug / log; javascript console is empty.
Same happens with development build.
I am not sure how to proceed. The same build worked a few days ago.

 

Running Unity Editor Version 2020.3.25f1 I did the following things.

Go to: Edit > Project Settings > Player > WebGL

There I did 3 Things out of frustration, so it might be one of those things OR all of them:

Under "Other Settings" tick the "Allow 'unsafe' Code"
Under "Publishing Settings" tick the "Decompression Fallback" and set "Compression Format" to "Brotli".

I hope that helps and wish you good luck with your Problem, because I sure don't know why it worked for me.

Edit: I'm currently doing the Unity Essentials Course, so it was just a simple Challenge. Which is why actually ticked the Unsafe Code thingy

 

Does this work for Unity Play?

 

For me it solved the problem! I needed the two options "unsafe code" and "Brotli" --- Thank you!