Hi,
thanks for the report. The main point/question is, if HSSS is also renamed to HSSK in XP11? Can you select HSSK in XP11? When no (and I assume you can’t), than its an XP11 issue in the world airport file which XP provide.
A few addons reference to this file, to be sure that you can’t select an airport/runway where you have no scenery in XP11 and exactly this happens here.
So, make a simple check and try to select HSSK in XP11. When you found it and you can select it - then we must further investigate but when you don’t find it and you can’t select it - you should report this to XP.
Cheers
Richard