Airport Invalid Child

I was trying to fix Kertajati Airport and make a new scenery but everytime I try to save i get this message:
I got all of the objects right, no errors on object just on the airport’s object

can someone help me resolve this?

Hello @java5588,
We will need your scenery xml to investigate.
You can send it to us via a private message. See section 3) Here


There is’nt a holding point linked to the runway. May be the problem.