Amnesia: Level editor map crash!

[Radical Batz]

So the map just started to crash randomly and gets the crash error which I think everyone is familiar with which is the "something is wroooooooooong" one.

So I checked the HPL Level editor file and it says this

"ERROR: Couldn't find 0-face '../../../../_pos_x', for cubemap '../../../../' in path: '../../../../'"

Now I don't understand exactly what it's trying to say, what's the error? can anybody help pls?

[PutraenusAlivius]

If you made a cubemap for a model then the cubemap is incorrect.

[Radical Batz]

I did not make a cubemap for a model, I didn't even make anything custom in this cs!

[PutraenusAlivius]

Well if you use any cubemaps it seems like the cubemap is troublesome.

[Radical Batz]

I don't know if this is a stupid question to ask but, "What's a cube map exactly"?