Ab wierd error

[Maxalu]

It starts normaly but after i lunch a character i get sometime this msg in log:

6:41:25 PM: System.UriFormatException: Invalid URI: The URI is empty.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at System.Uri..ctor(String uriString)
   at (String )
   at A.DSQ.U(String )
   at ArcheBuddy.Bot.Classes.CoreInternal.G(GS )
   at ArcheBuddy.Bot.Classes.CoreInternal.G(VG , Byte , Byte )

what is it?