Can't load world

[FloGamerMC]

I created a world an add it in the server config an this exeptions came up
System.IO.InvalidDataException: Could not auto-detect compression format. at fNbt.NbtFile.DetectCompression(Stream stream) at fNbt.NbtFile.LoadFromStream(Stream stream, NbtCompression compression, TagSelector selector) at fNbt.NbtFile.LoadFromFile(String fileName, NbtCompression compression, TagSelector selector) at fNbt.NbtFile.LoadFromFile(String fileName) at MiNET.Worlds.AnvilWorldProvider.Initialize() in C:\Daten\Coding\Projekte\MiNET\src\MiNET\MiNET\Worlds\AnvilWorldProvider.cs:line 239 at MiNET.Worlds.Level.Initialize() in C:\Daten\Coding\Projekte\MiNET\src\MiNET\MiNET\Worlds\Level.cs:line 139 at MiNET.LevelManager.GetLevel(Player player, String name) in C:\Daten\Coding\Projekte\MiNET\src\MiNET\MiNET\LevelManager.cs:line 115 at MiNET.MiNetServer.StartServer() in C:\Daten\Coding\Projekte\MiNET\src\MiNET\MiNET\MiNetServer.cs:line 154

[kennyvv]

The current anvil provider implementation is outdated & only supports up to 1.11 worlds. See issue #604.