Tearing off tab shows - Unchecked runtime.lastError while running guestViewInternal.destroyGuest: Unknown error -

[srirambv]

• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  Tearing off tab shows - Unchecked runtime.lastError while running guestViewInternal.destroyGuest: Unknown error -

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Windows 10 x64

• Brave Version (revision SHA):
  Brave 0.14.2
  rev 61ae1a7

• Steps to reproduce:

  1. Open two tabs, Open dev console
  2. Tear off one of the tabs to make a new window
  3. Console shows error

• Actual result:
  Console error when tearing off tabs

• Expected result:
  Should not show errors

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  N/A

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:
  

• Any related issues:
  cc: @bbondy

[bbondy]

Fixed by the Muon 2.57.10 update with this commit
brave/muon@3ce8375