PSE 8 registration - Error 150:30

I am trying to activate my copy of PSE 8 but before I can even enter my 6x4 code I get an "Error 150:30" message which asks me to restart my Mac, but which reappears after a reboot.

I am running OS 10.9.4. Is PSE 8 incompatible with Mavericks?

If so, what are my options?

If not, how do I get around this error message?

Thanks,

Mark