I have just downloaded the mod for 1.20.2 and after setting the mod mode (to spotify in my case), the login button just takes me to https://craftify.thatgravyboat.tech/login which responds with 404 page not found.
I have no idea if the build of the mod I got redirects me to the wrong site, or the site has some problem.

It was down for a few minutes due to some server maintenance that was being done but it should work now.