Licensing Error: Error 51133, F5 registration key is not compatible with the detected platform

Hi

I got a license error when I activated a license on a Redhat/KVM based VE (11.2.1)

Licensing Error: Error 51133, F5 registration key is not compatible with the detected platform - This platform

Registration Key     : XXXXX-XXXXX-XXXXX-XXXXX-XXXXXXX
System Serial Number : StrongBoxVE
Evaluation Duration  : 30 days
Contact              : admin@XXXX`
System Serial Number : StrongBoxVE
Evaluation Duration  : 30 days
Contact              : admin@XXXX

The platform file looks like:

platform=Z100
family=0xC0000000
host=Z100
systype=0x71

Any idea what went wrong?

Sven