Hey! The map only works in the Legacy branch of Pavlov since the new Pavlov update 29.
So if you wanna play workshop maps you'd have to go to your steam library => Click on Pavlov Settings => Beta Branch => Legacy

The update 29 now uses Mod.io, and I am planning to upgrade Oasis and Pandemic to it, but right now the CODZ gamemode is not working, so I gotta wait for a fix :)
You can play the new map I just released using the default pavlov zombies gamemode here:
https://mod.io/g/pavlov/m/villa-minecraft-zombies

Have fun =)

I'm also currently working on adding it to the new mod.io update, you can download it here and in game in the mod browser:
https://mod.io/g/pavlov/m/oasis-minecraft-zombies