is your NEXTAUTH_URL correct where you host the app?

Do I have to add that within my .env? If so then no I haven't set that

you don't normally keep .envs other than .env.local on the repo, for remote deployments there's other ways to set env vars in that environment, like project settings on Vercel

yeah thats what I mean .env.local

since you are using Vercel based on the screenshot, then it's where you should set it - in project settings -> environment variables on Vercel dashboard

Done, do you I have to redeploy or no

on .env.local it would be something like NEXTAUTH_URL=http://localhost:3000 whereas on Vercel, for production, you need to set it to the production domain

yea

I think you do have to redeploy for new ENV to kick in, not 100% sure

alr alr thanks

Could this be related to this?