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I had this issue on CentOS 7 - just installed and fully updated (over 300 updates!).

The fix was to first turn off the Calendar in the CentOS 7 -> Settings -> Online accounts.

This caused the calendar for the Google account to disappear in Evolution.

Then I added a new calendar directly in Evolution of type Google. Since I used two-factor authentication, I had to generate and App Password specifically for this in my Google -> Account Settings -> App Passwords.

I had been doing that before but the prompt would never accept that App Password.

When doing it this way, the App Password was accepted and I can access that Google account calendar in Evolution.