Error Loading Datapacks (No pack info for acp pack.mcmeta)

Some datapacks have an error when the server loads them. It says Resourcepack but it is a datapack. I looked inside of the folder and nothing seemed wrong...Error:

[12:53:15] [main/WARN]: Couldn't get pack info for: acp: 'pack.mcmeta' in ResourcePack './Main/datapacks/michael9r9r-s-rpg-loot-v1-11.zip'

Log: https://mclo.gs/sqCHmNc

Is there any way I can change it to match?

I have other 1.16 and even a 1.14 datapack but they all work.

I also tried running the rpg loot datapack in 1.16.5 and it still has the error, this time it's abl instead of acp.

Judging from the comments, the datapack works fine with other people.