Method not found: Serilog.LoggerConfiguration

[syntxx-error]

I got the following Error when I tried to Run the Parser, Master/Login and World Server.
I always got the Error at:
LoginServer/LoginServerBootsrap.cs at Line: 81 Shared.I18N.Logger.PrintHeader(ConsoleText);
WorldServer/Startup.cs at Line: 307 Logger.PrintHeader(ConsoleText);
MasterServer/Startup.cs at Line: 204 Logger.PrintHeader(ConsoleText);
Parser/Parser.cs at Line: 75 Shared.I18N.Logger.PrintHeader(ConsoleText);

I fixed the problem for me by simply commenting the lines out.