Okay, I’m seeing several things going on. One is that there are a lot of chunk errors which generally means that the save is corrupted. My suspicions are that the crashes caused the corruptions. So what’s causing the crashes?? Well, I’ll admit there are some errors that I haven’t seen before but the errors that I recognize are that you probably have some A19 files mixed into your A20 install. I’m also seeing some litenetlib connection issues but they aren’t consistent….sometimes players connect with ease, other times they are rejected.
This appears to be a home-hosted server, correct me if I’m wrong but generally speaking litenetlib connection issues are usually port forwarding/triggering issues so I’d check with a port scanner that the appropriate ports are open/forwarded on your firewall and router. As an additional step, I’d make sure that your 7 Days server folder has been excluded from your antivirus/antimalware software.
Finally, you need to wipe the server and install a fresh copy of A20 server. You need to remove all traces of 7 Days from the box including any world saves, mod folders if you have ever used mods.
Hopefully, if I’ve missed something, someone else will chime in with additional suggestions.