JCB service master 4 v 23.1.1 licence revoked usage dates are not within range

[blade900au]

Hi
I have keygen v2 but get error "licence revoked: usage dates are not within range" when doing the unlocks on this newer version.
I have also tried different unlock times in keygen but still get same error for long and short challenge.
Keygen worked fine on earlier versions so has something changed or is there a newer keygen.
Cheers
Blade

[blade900au]

Hi
Just to be clear the keygen works as normal the error is in service master when generated key is entered.