DO NOT ADD LUTS TO THE PROGRAM/PACKAGE FILES LOCATIONS! EVER!
In this thread is a chart for where USER created/acquired LUTs should be stored for access. Use those locations. Never ever add anything to the program/package folders!
First, the LUTs that are shipped in the program/package folder are used via a "relative" link to their PLACE in the folder, in computer alpha/numeric sorting, NOT by their name! As you add LUTs there you absolutely ensure none of them are accessed when you expect them to be used.
Second, those folders are expected to be identical in contents in all three apps ... PrPro, Ae, and MediaEncoder. As the three apps ALL reference any LUT in the package/program folders by that relative link. So if you add a LUT to the Pr folder, then queue the export to Me, a different LUT will be used at export unless again the Me folders are exactly the same as the Pr folders.
And third, when you migrate to a new version as in 2021 to 2022, if you use the proper 'external' LUT storage/usage locations, all the new apps will immediately see and use the correct LUTs you've already stored on your computer.
Neil