Problem's in the title. If I unlink GSX then the game loads and runs just fine, no problem. FSDT products (I have all but the Swiss mesh) work perfectly well in FS2020.
Event viewer shows an MSFS2024 crash followed by Couatl64_MSFS2024.exe crashing. The sim will load with couatl in the exe.xml and GSX unlinked, so it appears the problem is specific to the sim trying to load GSX and not anything to do with booting couatl.
Have tried with a few other addons as well as with a clean community folder.
Additionally, the FSDT installer crashes regularly. Though I can get things installed with persistence.
Windows 11 fully up to date. Have run sfc scannow, dism.exe, chkdsk, and windows memory diagnostic tool. Everything is healthy with zero signs of problems anywhere aside from this. Have completely uninstalled all FSDT packages and reinstalled multiple times -- problems persist.
Any help is appreciated.
Edit: found that deleting the "world of jetways" folder will allow FS24 to load with GSX linked. However, this will show GSX as unlinked in the installer -- attempting to relink causes a BSoD.