Invalid request error returned when attempting to connect

[mmv2307]

Access blocked: Gmvault’s request is invalid

[email protected]
You can’t sign in because Gmvault sent an invalid request. You can try again later, or contact the developer about this issue. Learn more about this error
If you are a developer of Gmvault, see error details.
Error 400: invalid_request

Additional detail was:
Error 400: invalid_request
The out-of-band (OOB) flow has been blocked in order to keep users secure. Follow the Out-of-Band (OOB) flow migration guide linked in the developer docs below to migrate your app to an alternative method.
Request details: redirect_uri=urn:ietf:wg:oauth:2.0:oob

This was using OAuth

[mmv2307]

version v1.9.1

[mmv2307]

From the 'learn more about this error' link https://support.google.com/accounts/answer/12379384

Access blocked: Third-party app is using an unsupported OAuth method
Google has safe ways for users to sign in and share their Google Account data with third-party applications. To help protect your account, Google sign-in requests are blocked from apps with less secure authorization methods because they’re more vulnerable to phishing and app impersonation attacks.

[JohnVillalovos]

To set your expectations. This project is dead and as far as I can tell the maintainer hasn't replied to anything about it in years.

[neochief]

Check this thread for the workaround: #361