The Navigraph data contains runway transitions for runways 4/22 and 8/26 without designators (L/R), those runways are not in the simulation, I assume that’s why the STARs fail to load.
My guess is that those are for the Water-Runways (4W/22W, 8W/26W), so in this case Asobo would need to add those runways or you have to use an add-on airport where those are added (shouldn’t be that hard as it’s just a definition of the runway on the water to add to the stock).
Maybe @NAVData can confirm that my guess is correct. In that case I’m not sure if you are handling Water-Runways differently at the moment, as the BGL/XML-structure has a dedicated designator for water runways but the current data seems to use the NONE-designator.