Hi mate this usually happens when you try to update a site that you haven't activated your license key for. Check you've got the correct site in your account page here.

Hey thanks for getting back so quickly. That was exactly it.

Cheers!

Nick

No problem, it comes up a bit because people forget to switch from their test site to a live one 😉

yuuup I can confirm that I had the plugin activated for my staging site as well 😂.