Then the Paths were likely still invalid and didn't point to where the files actually reside.

That didn’t work either. I even took it a step further and double-clicked the playlist file directly from its folder. Media Monkey opened it and scanned, but still couldn’t find any tracks. At this point I’ve given up and just recreated all the playlists.

Did you remove the empty Playlist from MediaMonkey, and then rescan it? Presumably the Paths are valid?

[quote=Lowlander post_id=530497 time=1763912455 user_id=262]
You may want to try absolute (full path with drive letter) and see if that works for you.
[/quote]

That was tried here:
[quote=meatsean post_id=530495 time=1763907125 user_id=62594]
But I update path to location of my music folder, that did not work.
[/quote]

As shown here:
[url=https://ibb.co/V0hXYYF5][img]https://i.ibb.co/V0hXYYF5/Example-1.png[/img][/url]

The later uses relative Paths. This means the Playlist file need to be in a specific location (relative to the files). You may want to try absolute (full path with drive letter) and see if that works for you.

It's hard to tell what to do. But I update path to location of my music folder, that did not work.
So, opened a valid Media Monkey playlist in Notepad to see paths, see below

[url=https://ibb.co/DfXVjCTz][img]https://i.ibb.co/DfXVjCTz/Exixting-playlist.png[/img][/url]

I copied what I believe is required path to incorrect playlist, see here

[url=https://ibb.co/6R5M5mwG][img]https://i.ibb.co/6R5M5mwG/Correcting-path.png[/img][/url]

Saved it, rescan MM, playlist is still empty.

Here is corrected playlist in Notepad:

[url=https://ibb.co/JwFngsm9][img]https://i.ibb.co/JwFngsm9/corrected.png[/img][/url]

I don't know what else to do.

This happens when the Path on the Playlist is invalid. You can check and fix Paths in any text editor (like Notepad) prior to scanning.

I imported the following playlist into Media Monkey 2024.1.0.3113

[url=https://ibb.co/BVL9R075][img]https://i.ibb.co/BVL9R075/Playlist-on-laptop.png[/img][/url]

Here are the imported playlist in Media Monkey playlist node.

[url=https://ibb.co/JWNMr2Sn][img]https://i.ibb.co/JWNMr2Sn/Playlist.png[/img][/url]

Why are the playlist blank?