rFactor doesn't show my derby track

[DevinXXL]

yesterday I tried to make a derby track, but it always stopped loading after 80% in rFactor, but there was no error. Then I made a completely new track, it worked, but after I removed the "collide" functopn of some objects, made new AIW and added 5 cams, rFactor doesn't even show the track. Then I started agin with a backup of the working verion, without gsstands and objects, only walls. But now it doesn't even show me this track

Can you help me if I upload the track for BTB pro?

Sorry for bad language