Check your other question. Check your environment to make sure the path to the views folder is set correctly.

Can you please confirm if your issue is resolved or not?

Hi @Benny Dadon have a look at this GitHub repo https://github.com/suyashjoshi/ringcentral-js-auth. This is a demo app that is built using the tutorial you were following. You can clone it and run it to execute the RingCentral-based authentication using the SDK's, just follow the instructions in the README. Also, make sure you're using the correct credentials.