Hey! Sorry you're stuck on this one.
In FS22, "shop blocked/full" usually means the spots where bought vehicles appear are blocked. Open the map in Giants Editor and go to gameplay > vehicleShop. Check that storeSpawnPlace1Start/End and storeSpawnPlace2Start/End sit on clear, flat ground, with no trees, buildings, fences or other objects overlapping them. Also check they aren't buried under the terrain. Moving those nodes to an open area and saving usually fixes it.
I couldn't find any MapToPlay project on your account, though. Did you make this map with MapToPlay, maybe in someone else's team? If so, tell me the project name and I'll check the shop setup in your export.
Cheers!