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Drupal 8 module problem: No 'Access-Control-Allow-Origin' header

drupal

#1

When I install the Drupal 8 module and configure it, attempting to log in gives me this message: WE COULD NOT REACH THE SERVER. PLEASE CHECK YOUR CONNECTION AND TRY AGAIN.

And I’m seeing this network error: Failed to load https://uua.auth0.com/usernamepassword/login: Response to preflight request doesn’t pass access control check: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ‘https://3910-auth0-ye4wami-2gsgzx7spxgoy.us.platform.sh’ is therefore not allowed access.

Any ideas how to solve this? Thanks in advance!