Error message possibly related to Trapper advance

I’m using the latest build on steam, 1665.

It may or may not be related to the trapper advance. I received the message:
“Uncaught You can’t insert an element into the DOM that has already been inserted”

The brown message window in the bottom left was stuck open, covering whatever buttons were trying to show up there.

As a side note, when I opened the “Post a Bug” menu item, I was unable to copy the unique ID using Ctrl-C. This wasn’t a crash bug though.

And when I loaded the save from this point, this happened: