Error connecting to Gmail; Project has not completed the Google verification process

[AdrianeNS]

I received an error when connecting to Google:

Access blocked: Move Your Filters has not completed the Google verification process

Move Your Filters has not completed the Google verification process. The app is currently being tested, and can only be accessed by developer-approved testers. If you think you should have access, contact the developer.
If you are a developer of Move Your Filters, see error details.
Error 403: access_denied

Could you possibly complete the verification process? This program would be extremely helpful for me! If there's anything I can do to help, I'd be happy to do so!

[AdrianeNS]

I forgot to post the error details. Here they are:

Error 403: access_denied
Request details: openid.realm= response_type=permission id_token redirect_uri=storagerelay://http/localhost:8000?id=auth87580 ss_domain=http://localhost:8000 include_granted_scopes=true client_id=319613019463-n61aht0ftue16tt83lpp3msd1487jsk5.apps.googleusercontent.com fetch_basic_profile=true gsiwebsdk=2 access_type=online scope=https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile openid https://www.googleapis.com/auth/gmail.settings.basic