Page Not Found after Login (React)

Hi,

I have a question regarding login:

When I log in to my application I get a strange error (in live mode only! login works on localhost:3000):
“Looks like you’ve followed a broken link or entered a URL that doesn’t exist on this site.”

As you can see in the picture my client_id, baseURL, issuer and and the login redirect URIs are configured correct (I hope?) Can you please help me?

This problem is in live mode only! The login works on localhost:3000

Thanks so much!

Best regards,
Daniel

Edit:
Got 404 for /implicit/callback on the production mode…