first try starting a server with default add-ons
if that works, try starting a server with only some add-ons.
keep adding add-ons until it breaks, and then narrow it down until you find the problem add-on.
however, I did get a similar issue, yet it wasn't because of any add-ons. I think my blockland had ran out of memory whilst loading my server, so it would crash before it would finish. Again, I fixed this by disabling add-ons.