Game and Plater version
Which is the game version and Plater version you're using?
Full /plater version output please.
Plater-v537.1-Retail - DF v384 - 10.0.0

Describe the bug

• Steps to Reproduce (what did you do to make the bug happen):
  Not certain what triggers it. Seen it in combat on several characters now, but not consistently.

• Result (what happens when you follow the steps above):
  Chat window gets spammed with OnShow error from this script (see screenshot)

Screenshots
Post images of the bug if necessary.

Duplicate of #134