ID is: 1675570
The final result was that it is a Plesk issue an email that said "It will be fixed in future updates of Parallels Plesk Panel"
Plesk provided a work around for windows and linux, using the command line.
For all those with this issue. I have MU#55 installed. I have created a support ticket with Plesk support. I did this at 7:30 tonight. They have been great at communicating via email As of 11:30 pm, they let me know they are sending it senior engineers.
I will post my results, as it may...
This also happen to me today. I tried running the commands as suggested and now the link to upgrade is totally gone.
Where is Igor when I need him? :) Can anyone help - I would like to get this done this weekend.