I have built airports before but this since SU13, when Save Scenery and I click on Build Package it causes a CTD.
I then go to my desktop folder for the project and run the xml file through the “fspackagetool.exe” and it builds OK, but also gives a message that MSFS crashed.
This happens repeatedly.
Here is a link to a video of what happens - I have built many airports before but never had this problem, it started after SU13 and the new SDK update.
In building a new airport from scratch and saving scenery then build project that triggers a CTD.
Here is a link to a video on the issue - https://photos.app.goo.gl/r96RQCUt5ebimSHk7