Exporting gltf from blender

I am getting this error while trying to export custom scenery to MSFS from Blender

You really want to use the Asobo exporter provided with the current SDK, (version 1.3.2)
on Blender 3.3.x
It is the only officially supported plug-in (and version)

The MSFSToolkit is not part of the SDK so is not supported by Asobo (and afaik is not supported since a long time by the former creator, maybe latest Blender version working with it is 3.0)

where can I find asobo exporter

In the SDK core installer (available via the Help menu in Dev mode in the game)

Or directly via the Asobo GitHub

If you need a starter, here is a quick video