Rear wheel will not move

Good morning,

This sounds like the brakes on the rear wheel are locked up. Remove the wheel and open the bleeder and see if that releases the wheel.

https://www.2carpros.com/articles/brake-caliper-replacement

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

The parking brake cable could also be an issue if it is frozen in the applied position.

I attached pictures and procedures for the repairs for you below.

https://www.2carpros.com/articles/parking-brake-shoe-replacement

Roy