[2021] Mods Failing to install

Please try the following:

- unsubscribe from all mods
- delete the folder Documents/Paradox Interactive/ck3/mod/
- delete the file Documents/Paradox Interactive/ck3/mods_registry.json (if present)
- delete the file Documents/Paradox Interactive/ck3/launcher-v2.sqlite

Add ck3.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list. You should add steam.exe and C:/users//AppData/Local/Programs/Paradox Interactive/launcher-v2.2021.6/paradox launcher.exe to that list.

- subscribe to a few mods
- run the game up and see if those mods are now available to you.

I hope that does it for you!