I'm playing on the 1.16.4 forge version and I am unable to put the datapack into the game due to it being "made for an old version of minecraft". Am I doing something wrong or does it just not work?

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.

Then there should be no datapack for you to put into the game if you have the mod properly installed.

Is this your own datapack? If so check the version number in pack.mcmeta. Older "versioned" packs should still work though, they just have that as a warning, not an error.

I didn't download any additional datapack. It was visible in the datapack menu once I got the mod downloaded. When I hover over it, it says it is incompatible