Hi @noxi_eu
Welcome to the Auth0 Community!
If the only error that you are receiving would be the Callback URL Mismatch one, then most probably the url have not been configured correctly inside the application.
Otherwise, are you using our React Native SDK with Expo? On our SDK page, it is mentioned that:
This SDK is not compatible with “Expo Go” app. It is compatible only with Custom Dev Client and EAS builds
You did mention that this issue persists on an EAS Build, I am just gathering more information on the matter.
Otherwise, could you please provide me the name of the tenant and application in an DM so I can take a look myself at your configuration? Also, would it be possible to share a github repository with the application code so I can check that out as well? It would help considerably in troubleshooting the situation.
If you have any other questions on the matter, please let me know!
Kind Regards,
Nik