Startup crashes are usually caused by invalid configs, outdated mods, or missing dependencies. Use this recovery checklist to get the server booting again.
Mods folder out and try a vanilla start.serverconfig.xml backup.Windows: %APPDATA%\7DaysToDie\output_log.txt Linux: ~/.local/share/7DaysToDie/output_log.txt
Free tool: Instead of reading it by hand, drop the whole log into the free 7 Days to Die Log Analyzer. It runs in your browser with no upload and no size limit, and names the startup killers directly: a mod DLL built for the wrong game version, a malformed XML file, a port already in use, or a corrupted region stopping the world load.