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

@@ -89,8 +89,9 @@ class SubCommand {
                     }
                 }
                 commandPart.guardCheck(commandSender, args, 0);
+                objects.add(0, commandSenderFunction.apply(commandSender));
                 method.setAccessible(true);
-                method.invoke(swCommand, objects);
+                method.invoke(swCommand, objects.toArray());
             }
         } catch (CommandNoHelpException e) {
             throw e;