The game's developer, Nicalis, and the modding community are working together to resolve the issue. The developer has released a statement acknowledging the problem and assuring players that a fix is in the works.
Download the mod from a reputable source (e.g., Modding of Isaac). the binding of isaac repentance mods no steam updated
To install mods, you'll need to find your game's mod folder. The location of this folder varies depending on your platform: The game's developer, Nicalis, and the modding community
Unlike Steam which syncs changes in the background, manual files must be updated over time to avoid crashes: To install mods, you'll need to find your game's mod folder
Launch your game. On the main menu, go to the "Mods" section. You should see your manually installed mod listed there. Click on it and press the spacebar to enable it. The game will usually need to restart to activate the mod.
“Steam versions rely on the steam_appid.txt to handshake with the API. The non-Steam versions? They just need to think the folder is the workshop. But the update broke the pathing. You need to force the game to load the 'resources' folder directly, bypassing the archive checks.”