Here is the link:
https://www.mouse-sensitivity.com/?share=6e08e611f69449d66b170b32f328a25b

I'm using Opera GX with DecentralEyes, Privacy Badger, Grammarly and UBlock Origin (I have a lifetime subscription so I don't get ads anyway) just in case one of those is part of the bug

why was this double posted

It should work now. This happened because the aims were out of range, and the calculations resulted in a division by zero.