Text and meaning of the error
This article will be removed soon because we have rephrased this message to help you find a solution in an easier way. The new message reads:
Sorry! The authentication process failed. Verify your account credentials in Studio Pro and try again. For further information about credentials refer to this article.
This error may occur when working with activities, related to Google services.
The error message can look like this:
Application-specific password required:
https://support.google.com/accounts/answer/185833 (Failure).
If you encounter this error, it means that you do not have the Google App Password set up correctly.
Solution
In order to solve this error, you need to set up the Google App Password. You can learn how to do it in this article.