I also did uninstall and reinstall both GSX and the LPPT airport but unfortunately didnt work
I already explained why that particular airport doesn't work: you are using a custom profile which was made with P3D 4, that specifies a custom texture that doesn't exists in P3D V5, which only allow to use textures taken from its list, not custom textures, which required DirectX 11.
That's why I asked if you are sure you are fully updated because, in the current version of GSX, when loading an airport profile made for P3D V4 that contains textures that are not stock, those names are supposed to be ignored and revert to the automatic selection based on the jetway texture rules, and the file should have been flagged as being P3D5 only and saved as a new copy, so P3D4 would continue to use the old profile, and P3D5 would only load the new one, cleaned up of unsupported custom texture names, and this is done for the precise reason to prevent those errors.
That's why I asked to post that profile, because ( unless you haven't updated ), it seem procedure is not working for that profile, so I wanted to check.
