Oh, I made a mistake. Indeed, I have FullEditor.pak with that date, but judging by its contents, a tank, for example, should be in the artifacts, but it's not there. Just like other things that should be there, but unfortunately, they aren't.

The map opened for me.
Perhaps this will help:
1) Change the map name to the original one, which is "fs" here.
2) Check the path to the map (there should be no Russian letters in the path; sometimes, people confuse the English and Russian "C" because they are on the same key).
3) The map should be in the maps folder, and you should close the editor first and then open the map through it (sometimes, people open it differently).
4) Check if you are running the correct copy of the game relative to the map.
5) The map was made in a later version, so it doesn't open in the "old" editor.
6) Reinstall the game...

And here is a screenshot showing where to get the gating.