Whenever I startup my server I get this error from the Discord Relay Bot, I have enabled all intents.
Using MCGalaxy 1.9.5.3 on Debian 9.13.

(14:45:25) Discord read error (The authentication or decryption has failed.)
(14:45:25) Discord relay bot closing: 1000
(14:45:25) Disconnected from Discord!
(14:45:25) Connecting to Discord...
(14:45:25) Discord read error (The authentication or decryption has failed.)
(14:45:25) Discord relay bot closing: 1000
(14:45:25) Disconnected from Discord!
(14:45:25) Connecting to Discord...
(14:45:25) Discord read error (The authentication or decryption has failed.)
(14:45:25) Discord relay bot closing: 1000
(14:45:25) Disconnected from Discord!

Edited January 25Jan 25 by Saraistupid

Figured it out, since Debian repos do not have latest Mono, at least for Debian 9 Stretch, I had to get Mono from the Mono repos, here's how I did it for anyone coming in the future:

If you installed Mono already, uninstall it
$ sudo apt-get purge mono-runtime && sudo apt-get autoremove

Install a more recent Mono:

$ sudo apt install dirmngr ca-certificates gnupg

$ apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF

$ echo "deb [trusted=yes] https://download.mono-project.com/repo/debian/ stable-stretch main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list

$ sudo apt update && sudo apt upgrade

$ sudo apt install mono-runtime/stable-stretch

Hi, just a reminder that Freexian is ending support for Debian 9 "stretch" next year in 2027, and you should update before it is left completely unsupported.

The main repositories in Debian 13 "trixie" (the current stable release) provides Mono 6.12.0.199, which works to run MCGalaxy. The Official LTS period for Debian releases has been increased to 5 years, so free support of Debian 13 will last until 2030, with Freexian support into 2035. Good Luck.

Edited yesterday at 04:02 PM1 day by jshtab
I got the codename for Debian 13 wrong