Sorry, but I think you did not get the point. I enabled the GSX-jetways for EDDE only - not any other airport - and the jetways were not connected and I got the "bad jetway data"-message. EDDE is a bare default airport in my sim.
Why both of you keep insisting I'm "not getting the point" ? Have you even read what I wrote in the post I linked ? I tested EXACTLY that airport, default EDDE, in MSFS 2020 and as you could see in the video I posted, those are clearly GSX Jeways, and they work!
The only possible reasons why this can happen are:
1) You don't have the latest update installed. Yes, you said you have version 3.7.1, but that doesn't mean anything more than the manifest.json for GSX is from version 3.7.1, doesn't say anything about the rest of the files, and the Jetway replacement files have been updated recently to match the SU16 database, so it's possible that if your local cloudflare node wasn't updated when you updated to 3.7.1, you might have got an outdated version of the GSX replacement jetways so, try again to update now.
OR
2) There might be remnants of a previous version of the replacement files in the fsdreamteam-world-of-jetways package. They are not supposed to be there anymore, they are in a separate package now (fsdreamteam-world-of-jetways package-2020), and the installer WILL remove the old files from the old location when you perform an update, but if it couldn't for some reason (antivirus interference, permissions problems), you might still have a duplicate outdated version in the fsdreamteam-world-of-jetways package folder, so try updating again. To be clear, this folder:
\Addon Manager\MSFS\fsdreamteam-gsx-world-of-jetways\scenery\FSDT_WorldOfJetways
Should contain only ONE single .BGL named FSDT_WorldOfJetways_Lib.BGL, if you have the other .bgl with the ICAO codes, that's wrong and they are supposed to be removed by the installer, because they are now located here:
\Addon Manager\MSFS\fsdreamteam-gsx-world-of-jetways-2020\scenery\FSDT_WorldOfJetways
3) Check if the 3 GSX packages in the Community folder are Symbolic links (small arrow on them) and NOT real folders (no arrow). If they are real folders, it's either because you must have copied their folders manually or you restored the Community from a backup, so the restore translated the Symbolic links into real folders, so the simulator is using an outdated copy. If this is the case, REMOVE all GSX folders from the Community, enter the FSDT Installer and click RELINK, to recreate the links as they are supposed to be.