[RPi B] - Jackett web connection

Hi, have issue connecting to the Jackett webpage on port 9117.

On Windows Chrome:

ERR_CONNECTION_REFUSED

On iPad Safarai:

Safari cannot open the page because it could not connect to the server.

Hi, I checked online and saw a few posts. Tried to follow instructions, reinstalled Jackett as well.

https://plaza.quickbox.io/t/sonarr-unable-to-connect-to-indexer-check-the-log-for-more-details/1292/40
https://github.com/Jackett/Jackett/issues/415

Those did not help so instead I ran it from command line and got the below:

root@DietPi:~# mono --debug /opt/jackett/JackettConsole.exe
07-19 02:30:19 Info App config/log directory: /root/.config/Jackett
07-19 02:30:25 Info Starting Jackett 0.7.1581.0
07-19 02:30:25 Info Environment version: 4.0.30319.17020 (/usr/lib/mono/4.5)
07-19 02:30:25 Info OS version: Unix 4.9.35.0
07-19 02:30:25 Info ThreadPool MaxThreads: 100 workerThreads, 4 completionPortThreads
07-19 02:30:25 Info issue: Raspbian GNU/Linux 8 \n \l
07-19 02:30:25 Info mono version: 3.2.8 (Debian 3.2.8+dfsg-10)
07-19 02:30:25 Error Your mono version is to old (mono 3 is no longer supported). Please update to the latest version from http://www.mono-project.com/download/

Traced it back to:
https://github.com/Jackett/Jackett/blob/7c2b801ee93b7e9422ed88d8a31258ca1f8fa79b/src/Jackett/Services/ServerService.cs#L218