[kmail2] [Bug 410027] New: Fails to connect to GMail - "disabled for this app"

[Mark Stanton]

https://bugs.kde.org/show_bug.cgi?id=410027

            Bug ID: 410027
           Summary: Fails to connect to GMail  - "disabled for this app"
           Product: kmail2
           Version: 5.11.2
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: misc
          Assignee: kdepim-bugs at kde.org
          Reporter: mark at stantoncentral.co.uk
  Target Milestone: ---

SUMMARY

Kmail (from Kontact) fails to connect to GMail account.
Google reports

Sign in with Google temporarily disabled for this app
This app has not yet been verified by Google in order to use Google Sign in.

STEPS TO REPRODUCE
1. Attempt to connect to GMail account
2. 
3. 

OBSERVED RESULT

Dialog with error message as above.

EXPECTED RESULT
Should connect and show email.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Fedora 30
(available in About System)
KDE Plasma Version: 5.15.5
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.4

ADDITIONAL INFORMATION
Stopped working 17/7, I believe.

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