The pending user E-mail has had their invitation access level changed to 'Admin User' on your AdSense account (publisher ID) by account administrator E-mail.
If you believe that this change was made in error, please contact that
account administrator directly. Please be aware that Google AdSense is
unable to mediate access disputes between users.
To learn more about access to AdSense accounts, please visit:
https://support.google.com/
If you're unable to click any of the links above, please copy and paste
the URL into a new browser window instead.
Sincerely,
The Google AdSense Team