Tor Browser Network configuration window gives an error when you try to select a Pluggable Transport.
Mac OS 10.12.6 Tor Browser alpha 7.5a8 screenshot: https://trac.torproject.org/projects/tor/attachment/ticket/24446/Tor_Network_Settings_and_About_Tor.png
Steps to reproduce:
- click on Tor button menu and select Tor Network Settings
- select 'Tor is censored in my country'
- try to pick a built-in bridge from drop down menu
- click 'ok'
The error from the screenshot shows up - this doesn't happens all the time, and not just with one specific bridge.
Could not reproduce the same error on Tor Launcher tho, just on network settings.