Hi, finally got to look into it, sorry for the huge delay.


This looks to be an issue with the mod being loaded for the replay that goes first in your replays folder and not necessarily with the game client itself (well, at least not the macOS build specifically). Fastest solution to check if that's true would be to either delete, rename or move any replay that shows before 0headkick.rpl in your replays folder if you sort by name.
You can get to the replays folder by going to Toribash properties in your Steam library and pressing the "Browse local files" button in Local Files tab - folder you need is "replay".

Also would appreciate if you could send the replay that appears first in your replay folder so I could investigate what exactly goes wrong there - it seems related to the custom message being set by the mod but I'd need to see the actual replay and mod files to be able to tell what's it there that breaks the game to fix it.