I updated forge to 43.1.43, and from checking the logs, the mod (on its latest version, including Moonlight) seem to cause the game to not start at all, bringing me back to the launcher.

latest.log
Here's the logs

Can you confirm that it works with an older forge ?

Ironically, it doesn't work with 43.1.34 and it worked in 33

latest.log
here's the .34 logs

It worked in .33 as I was playing that a few days ago

Alright so: I found out I had the wrong version of Supplementaries installed on the Forge 43.1.34 version, I will check if this is the case with .43

I will be closing this issue, apparently in the .43 version I didn't have the right versions either, it was an oversight by me