I am trying to make a map for Project Zomboid and when exporting as a TMX it crashes when I try to open the exported file (error message: Error opening ‘C:/Program Files (x86)/Steam/steamapps/common/Project Zomboid Modding Tools/WorldEd/LVWEST/worldEd/01_02_0_0.tmx’:
Unsupported map orientation: “levelisometric”
Line 2, column 104)
I need help 
Did you try correcting the reported error, i.e. making sure the orientation is correct (if isometric isn’t supported) or is specified correctly (if “levelisometric” isn’t the way to do it)?
Well, Project Zomboid uses its own Tiled fork called TileZed, which you should be using instead of Tiled if you’re making maps for that game. Check out the TileZed page on PZwiki for links to binaries and its repository.
figured out how to fix it now! Turns out I had the tiles directory set as 2x when it was meant to be just Tiles
Just for the record, you seem to be facing issues that are unique to TileZed / Project Zomboid. We can’t in general help you with problems in TileZed and you should rather look for support in the Project Zomboid community.
I’m glad you’ve got that problem sorted out, though!