I literally just can't convert to it, every other game works and I've tried a different browser and it just wont work

I see there's a bug when converting from distance to Windows, I will look into it. In the meantime just convert from sens instead as a workaround:

https://www.mouse-sensitivity.com/?share=d4d9bbbb6515c858f33143083f2a08f5

Thanks for letting me know!