V5.3.5:

- core/irc.py : Nothing special except
        a notice sent to the user that the command
        is not available
    - mod_clone:
        When the user unload the module, the
        server will unset modes of #clone channel
    - mod_defender:
        * adding a try block to catch errors
        * adding a mode block to check if
        the jail channel is not having +b mode
        * ensure defender is +o in jail channel
    - mod_test:
        * adding some try block to catch errors

core/irc.py

@@ -1010,7 +1010,8 @@ class Irc:
                             arg.remove(f':{self.Config.SERVICE_PREFIX}')
                             if not arg[0].lower() in self.commands:
                                 self.Base.logs.debug(f"This command {arg[0]} is not available")
-                                return False
+                                self.sendNotice(f"This command [{self.Config.COLORS.bold}{arg[0]}{self.Config.COLORS.bold}] is not available", user_trigger)
+                                return None
 
                             cmd_to_send = convert_to_string.replace(':','')
                             self.Base.log_cmd(user_trigger, cmd_to_send)