Whenever I try to start GSX at LFPO by Jetstream Designs the menu opens with the loading screen and I recieve the error message "there are no parkings at this airport" in the top left corner.
And also discussed at Page 63 of the manual, the "Airport Visibility" parameter to deal with airports with fake ICAO codes representing Auxiliary airports/helipads/seaplane bases. In your case, it was the fake airport named VOLC2, which according to a user posted there, can be fixed with a visibility command made like this:airport_visibility_volc = 0