Key was rejected by service

[Paolo Galtieri]

Folks,
  I have installed vmware on Fedora 33.  It does not start due to the 
following error:

modprobe vmmon

modprobe: ERROR: could not insert 'vmmon': Key was rejected by service

modprobe vmnet

modprobe: ERROR: could not insert 'vmnet': Key was rejected by service

dmesg shows

vmmon: Loading of unsigned module is rejected

The modules have been compiled from source.  How do I get around this 
issue so I can run vmware?

Any help is appreciated.

Paolo