Crash Adding Touch Bar Button Action

Created new Touch Bar button.
Named it - note that I added a symbol from the "Show Emoji & Symbols" viewer.
Tried to assign an action.
Crash.

BetterTouchTool_2019-07-21-091222_HFTrMBP.crash (95.6 KB) BetterTouchTool_2019-07-21-091325_HFTrMBP.crash (95.6 KB)