Please remove the self vote, your comment is off topic and, you know, you're a prolific self voter so don't think you need it.

I'm not sure why you're getting an application error but it sounds like a bug. As the readme says I don't provide support, it's a hobby project, but I do look at bug reports. Feel free to open a ticket on the GitHub and I'll have a look.

I don't use Steem.chat any more.