HEVC Codec for Premiere Rush with paid subscription?

Hi.

I've just completed my first small project in Premiere Rush, and need to export/share to my PC.

When it comes to  Rendering , it part does it then an error comes up saying I need HEVC codec which is included with paid subscription.

How do I access this and get Rush to save my project?

I've looked up "help", but the only thing I can find is where to buy it, which I shouldn't have to because of my subscription?

I also can't find where to contact Adobe help direct.

Any ideas please?

Cheers.

Steve.