So if I accept the invite to sign up to my site (to use admin panel), I get the pop-up but if I try to sign up, it gives me a 404 error.
Same thing happens in the admin page as well.
Site: https://shashiks.netlify.app
Source Code: https://github.com/vishalscodes/sks
I have set the github gateway too.
Any help is appreciated.
If you haven't setup an authentication provider, you'll get a 404. https://decapcms.org/docs/github-backend/
You need to prepare an oauth provider to use github as a backend.