You are trying to generate the Bulk Enrollment Token in your tenant to support Entra join of your devices:

But when you click “Generate” nothing happens, or you are taking to the Microsoft authentication page

but after Sign in, you are returned with a blank browser screen:

This will happen if the URL you have started your configuration from in PowerSyncPro does not match the Redirect URI in your App Registration. 

Entra ID App Registration Authentication\Platform configuration\Single-page application\Redirect URI

By default we recommend connecting to the PSP Server Console and using http://localhost:5000 to make your initial configurations.