Learn to read the logfiles, as a server operator your first look with any problems should always be the logfile. Everything the game does is in there, including the full paths it reads savegames and config files from. Logfiles are in 7DaysToDie_Data/
If you are still 3 years old, you could also post the last logifle into pastebin and a link to it here and then we will tell you

. But it will save you losts of time later if you acquire the skill to read logfiles yourself. Reading a few logfiles posted here in general support and reading what experienced users say about the contents can also help you notice what is important in there and what isn't.