There's no issue whatsoever with GSX, it was just an issue of your local updated server node not fully update with the latest files. Just run the FSDT Live Update to fix this.
Just to be clear: the FSDT Live Update I'm referring to, is the "FSDT Live Update" ICON on the Desktop, not the "Live Update" menu under the "Addons" menu in the sim, which is currently not functional, but we are bringing it back in the next update.