MQTT not starting (hassio) mosquitto installed outside of docker

I saw this error message,
19-03-21 15:13:52 ERROR (SyncWorker_2) [hassio.docker] Can't start addon_core_mosquitto: 500 Server Error: Internal Server Error ("driver failed programming external connectivity on endpoint addon_core_mosquitto (4b8f3bf237d79235e35965bf2de0e0ff7a3186c457c8047e0d942f1737578250): Error starting userland proxy: listen tcp 0.0.0.0:1883: bind: address already in use")

in my config i used 127.0.0.1 on my ubuntu server
I use docker for everything except mosquitto, mosquitto i installed by using sudo apt-get install mosquitto

This specifies the local host of the docker container HA is running in. You need to specify the ip address of your Pi to reach mosquitto installed on the host.