Hi Olivier,
Thanks for your query !
It appears that the issue may have occurred due to VMware ESXi. Kindly share the following details in order to check and confirm.
Does the issue appear on physical machine or only on VM machine?
Check and share if this Superpro key works fine on another machine.
Try to disable the Antivirus (if installed on the machine), check again and share the results.
Issue appears on Single machine or Multiple machines ?
Thank You,
Gaurav Bhanot