License blacklisted!

Hi,
i've a problem with my License Key for Parallels Desktop 19 Pro for Mac.
After i want to use it on my second Mac, an message "this key is blacklisted" showed up an i can not activate it on my first and my second mac.
Can you help me?
When needed i can you give my License Key and other information from my purchase.

Thank you
kind regards

Christian

 

Hi,
I've also got a problem with my License Key for Parallels Desktop 16 for Mac M1 build.
A message "this key is blacklisted" showed up an I can not activate it on my Mac M1.
Can you help me?
When needed I can you give my License Key and other information from my purchase.

Thank you
kind regards
Jan

 

Hello
I also seem to have this problem with my License Key for Parallels Desktop 16 for Mac.
Any advice is greatly appreciated.
cheers