I was able to duplicate the issue, but I think it's because Quick base is still trying to deal with saving the Work Order and then you are sort of nesting in a save of a Subdivision, and then trying to save a Child on the Subdivision (ie the location) before you have actually saved the workorder and QuickBase can't handle that situation.
One suggestkion though.
On any parent table always check the box in Advanced settings for
Save parent record automatically when a child record is created
_From the user perspective, the answer will always be "yes" (ie yes you dummy App Builder of course I want to save the Parent so I can continue to add the child. Why else do you think I took the time to do that data entry to create a Parent, if not to save it?"). That box really should default to checked, imho, but for legacy reasons I think, it does not.