License key does not work

I have a educational version of rhino 6. I got a license key for Rhino 5 for mac through this link:

Yet it seems to have expired after exactly one month. Is this normal? 'Cause I payed for the educational version.

You probably forgot to validate the V5 for Mac license. If you type _ValidateLicense in your V5, what happens?

I can see the license was validated after your post.
You called it @Helvetosaur