Fix SWCommand

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -105,7 +105,7 @@ public abstract class SWCommand {
         } catch (CommandFrameworkException e) {
             if (Bukkit.getServer() != null) {
                 Bukkit.getLogger().log(Level.SEVERE, "", e);
-                Core.MESSAGE.send("COMMAND_SYSTEM_ERROR", sender);
+                Core.MESSAGE.sendPrefixless("COMMAND_SYSTEM_ERROR", sender);
             }
             throw e;
         }