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SafeExamBrowser / seb-win

Safe Exam Browser 2.x for Windows. IMPORTANT: This is the legacy version which isn't actively developed anymore.
https://safeexambrowser.org/windows/win_usermanual_en.html
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Red Screen on Startup - Lost Connection to SEB Kiosk Application #110

Closed pfurches closed 3 years ago

pfurches commented 3 years ago

IMPORTANT Please always consult the documentation first before creating a bug report! https://safeexambrowser.org/windows/win_usermanual_en.html

Describe the Bug When starting SEB 2.40, 2.41 or 3.1 on a hotspot connection the screen turns red and the following error is displayed. Lost Connection to SEB Kiosk Application

Steps to Reproduce

  1. Connect to a wi-fi hotspot.
  2. Launch SEB. Version 2.40, 2.41 and 3.1 all do the same thing so we are using 3.1.
  3. Red screen appears with error. Then asks for password to unlock.

Expected Behavior SEB testing site should open for user to login.

Screenshots If applicable, add screenshots to help explain your problem. 20201119_112052

Version Information

Additional Context We use a PAC file for filtering and have added all known exceptions and excluded SSL inspection for the same URLs. These are cleanly imaged devices with no other software installed on them and all current Windows updates.

dbuechel commented 3 years ago

This issue cannot affect SEB 3.x, as there the browser is integrated in SEB itself, i.e. this lock screen message doesn't exist in SEB 3.x. Regarding your issue, SEB 2.x communicates with the separate browser application via a websocket connection on localhost. If you're using proxies and / or firewalls, make sure that you allow those connections.

pfurches commented 3 years ago

The screen shot you are seeing is from version 3.1.0.228 so I have to disagree. It is happening on 3.1 right now and I can duplicate the issue on hundreds of devices.

dbuechel commented 3 years ago

I'm sorry, that cannot be correct. I literally wrote the entire code of SEB 3.x and am perfectly certain that this error message only exists in SEB 2.x. When reporting a bug, it is imperative that the provided information is accurate, otherwise it is hard for us to efficiently track down issues...

pfurches commented 3 years ago

I just verified Program Files\SafeExamBrowser\SafeExamBrowser.exe is version of 3.1.0.228. Would you like to remote into the device and see it yourself?

pfurches commented 3 years ago

So I am looking at this and it looks like remnants of 2.41 are still on the system and did not remove when the 3.1 MSI ran. I am removing everything and rebooting and trying again. At least the service from 2.41 are still installed.