Blender export error for .dff and .fbx

Hello, i think my blender file got corrupted, i tried to export the blender file as .fbx but then it can’t be opened as the .fbx file from other software. And it also can’t be exported as .dff file with dragonff addon or other gta plugin for blender. I tried to remove doubles but it still not fix it. I really don’t know what to do anymore… (Sorry for my bad english…, i’m also new here)

here’s the error message when exporting the blender file to .dff file from gta tool addon: