Welcome to BVEStation.
Here's a screenshot I took today of the object folders.
Make sure the NYCTCommon folder is there as well.
I just checked, it's present.
If NYCTCommon is in your main object folder, you should have no problem. If the problem persists even though it is present in your main object folder, I don't really know how to help you.
In my practice the only scenario to work was the JAY-ATL connection. And that one doesn't have signal objects. That might have something to do with it.
Does it have tunnels?
Yes, actually.
I put the openbve folder from the NYCT object pack in the object folder and it still saidd openbve has stopped working.
Thanks! 3.0.1 worked perfectly! A bit of lag, but that is just my computer. You are awesome!