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What is “the project tab thing”? It’s strange, because as per the TMX changelog, the only changes to the map format have been the addition of two attributes and a custom property type, all of which should only affect the file when used. Maybe the game is checking the version? Did you check the files for any other difference?

 This is "the project tab thing"

I will also try to check the logs for any errors I can find

I found the logs (I think) and I'm running Tiled 1.8.6 at the moment to boot it up. Here it is


  "runtimeOptions": {

    "tfm": "netcoreapp3.1",

    "includedFrameworks": [


        "name": "Microsoft.NETCore.App",

        "version": "3.1.0"



    "configProperties": {

      "System.Globalization.Invariant": true,

      "System.Runtime.TieredCompilation": false




I think the file could also be corrupted somehow. I'm going to copy everything over to a new map. Will post any new results I can find

Ok, copying the file straight over didn't work. I'm going to manually recreate it now

Recreating it manually also didn't work. I will try it without the objects later

Maybe you could open an issue about your problem at This comments section isn’t really suitable for long threads.

Ok, will do it