Unable to access Plesk secured by Google Authenticator: "The page isn't redirecting properly" or "ERR_TOO_MANY_REDIRECTS"

Symptoms

• Plesk license has expired or has been terminated.

• After a successful login to Plesk, the interface fails to load with one of the following errors:

  PLESK_INFO: The page isn't redirecting properly

  ---

  PLESK_INFO: This page isn’t working
  203.0.113.2 redirected you too many times.
  Try clearing your cookies.

  ---

  PLESK_INFO: ERR_TOO_MANY_REDIRECTS

• The URL of the failed page is from the Google Authenticator extension:

  PLESK_INFO: https://203.0.113.2:8443/modules/google-authenticator/index.php/index/auth?return=%2Fcp%2Flicense%2F

Cause

This is a Plesk bug with ID PPPM-14096.

Resolution

1. Disable Google Authenticator temporary.

2. Activate Plesk license.

3. Enable Google Authenticator back.