Hi, I have just tested and identified the issue. The crash issue is due to AIW problem for trackday layout only (likely the "cap end of path segment" fix was not made into trackday layout). The raceway layout is not affected. To @Corti , just copy willow.AIW from WillowSprings_Raceway.mas and rename to willow_balloon.AIW, then package into WillowSprings_Trackday.mas should fixed the server crash, thanks mate.
Thank you very much @Corti and @svictor Works perfect. Right in time for our races on monday evening. ;-)