Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Troubleshooting [Bug] UserCanAlterTags = 1 breaks custom origin

That part of the game seems to use MD5 hashes to verify whether the content is valid, and when the MD5 hash doesn't match up against the index, the content is not loaded.

You can see the MD5 hash index in pakgenerator.txt; however, I have not found a way to circumvent this check.