I had the same problem. Check the datapacks folder and make sure the packs are still in proper zip format and no extra layers of folders. A folder with a .zip extension does not make it a .zip
Its 1.6.4 verson/assets
I had the same problem. Check the datapacks folder and make sure the packs are still in proper zip format and no extra layers of folders. A folder with a .zip extension does not make it a .zip