That's very strange. I don't get any error, see the attached screenshot, which shows GSX 1.9 deicing the default Lockheed Constellation under P3D 2.4, at FSDT Geneva.
The usual suggestions should apply:
- Turn off the antivirus, and configure it to exclude P3D\bglmanx.dll and P3D\fsdreamteam\Couatl\Couatl.exe files from scanning
- Don't use the P3D Migration Tool.