Tridus |
If you already installed Foundry 12, you'll need to uninstall it and reinstall Foundry 11. If you didn't migrate anything to 12 you should be fine, otherwise you'll also have to restore your backup to the 11 version.
Then watch here for a v12 supported version of the system: https://foundryvtt.com/packages/pf1
I didn't see an issue for where they are on v12 support, so I have no idea when that is coming.