…Have you tried turning off and on again?
First, check your settings. Second, your firewall. Make sure JMMServer is running, and the option to disable kodi is not checked.
If you need help, but don’t it’s actually a bug, we have a section on JMM’s discord: https://discord.gg/0XKJW7TObKLajoKc
Report bugs here. Use the search button, we probably have already heard, and may have already fixed it: