I'm getting the same issue. I just had assumed that highlight was broken and the dev abandoned the project.
That's what happened.
D'aw it was such a nifty little plugin.
Although there are a couple other plugins that I'm having issues with so it's not a primary focus of mine.
lua spouts out errors when I have ohshi running as well, I will load it up and see if I can get the exact error script.
guildwork wont add my mule to my account, and always logs me in as I'm shutting down my client vs when I'm logging in.