Huh, this is so weird since other textures has been loaded successfully, and it looks like the file can't be opened instead of can't be converted to a texture file. Can you copy the loading.png from the old version into it, to see if it was corrupted, or if it's there at all? or replace with any other images to see if it will run?
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Usually if you want to make a nice macOS app, you'd need to pack it into a .app folder so as in macOS it would appear as a whole app. Exporting with CMake just creates a Unix executable file that works the same way as .exe in Windows, except it always launches in Terminal. And here we go, that's your "command line window" method.