I've had a similar issue, but across random airlines.
The texture folder is placed, but the aircraft.cfg file doesn't get the entry added.
I've gone through and manually added the CFG file entries to fix it, but it's definitely still happening.
Below is a log entry from one of the failed installation aircraft.
Log Entry : 10:11:23 AM Thursday, May 14, 2020
:
:Unable to install: China Southern Airlines Boeing 737-800WL - Skyteam
-------------------------------
Could not find file 'D:\P3D_AIMOCI\AIGAIM - OCI\SimObjects\AIGAIM_FAIB_B737-800WL\texture.CSN-China Southern Airlines_Skyteam_temp\FAIB_737_800_T.dds'.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.File.InternalReadAllBytes(String path, Boolean checkHost)
at AIGTech.Textures.Files.TextureFile.readHeader()
at AIGTech.Textures.Converter.TextureConverter.ConvertToBestCompression(String directoryToConvert, String optional_pathToImageTool)
at AIGTech.AIManager.Controller.AIManagerController.OCI_InstallRepaint(AircraftDataSet set, Aircraft aircraft)