in the meantime you can either export with the option “Visible objects” active (to bypass that code line)
or replace the file in C:\Program Files\Blender Foundation\Blender 3.6\3.6\scripts\addons\io_scene_gltf2_msfs_2024\io\exp
with included one (basically adding the missing “o” for the word object at line 407)
msfs_multi_export.zip (5.7 KB)