[tbb-bugs] #16863 [Tor Browser]: console.error on new Tor Browser window

[Tor Bug Tracker & Wiki]

#16863: console.error on new Tor Browser window
--------------------------------+--------------------------
 Reporter:  gk                  |          Owner:  tbb-team
     Type:  defect              |         Status:  new
 Priority:  minor               |      Milestone:
Component:  Tor Browser         |        Version:
 Keywords:  tbb-5.0-regression  |  Actual Points:
Parent ID:                      |         Points:
--------------------------------+--------------------------
 Opening a new Tor Browser window gives the following error:
 {{{
 console.error:
   [CustomizableUI]
   Custom widget with id loop-button does not return a valid node
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16863>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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