If you use Laravel (Jetstream) with user email verification enabled and you
get this error 403 Invalid signature
when you want to confirm an user
email address, you should check if you are executing your Laravel application
behind a reverse proxy (e.g. Traefik, Caddy). Some cloud services like Heroku, Coolify
or AWS ELB do this, too.
In this case you have to configure Laravel to trust the reverse proxy. This will fix the problem: