"myController is null" error when closing the browser

Closing Tor Browser throws a JavaScript error:

May 30 06:17:45.000 [notice] Owning controller connection has closed -- exiting now.
May 30 06:17:45.000 [notice] Catching signal TERM, exiting cleanly.
JavaScript error: chrome://torbutton/content/tor-circuit-display.js, line 466: TypeError: myController is null

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information