The same thing happened to me, when I added a court10. The system log told me there was no custom court ... while I had not named anything "customcourt01". Once I named the folder "customcourt01" instead of "court10", everything went fine. I still didn't figure out with my tired head why the system needed that "customcourt01" ...
. But I won't use 199 courts at a time, so I didn't bother much.