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Using Fiddler causes app to get errors

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This is a migrated thread and some comments may be shown as answers.
Ren
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Ren asked on 27 Sep 2018, 06:32 AM

I'm using Fiddler to capture HTTPS traffic for a mobile game (emulated on Nox version 6.2.3.1). After you click past the title screen, the game takes you a loading screen, which downloads data from the internet. It always stops working once Fiddler captures the base URL for the game. An example of that error is shown in the first image. It seems to be working fine without Fiddler running.

It doesn't just effect Nox and the game, it also effects my web browser (Google Chrome). It always states that my "connection is not private" and prevents me from entering most websites with Fiddler on (some exceptions include this website and Discord), shown in the second image. When I exit out of Fiddler, it works perfectly fine again.

I believe that the reason why Fiddler is acting this way is because I have "Decrypt HTTPS traffic" turned on. For Nox, I followed the instructions shown here to capture the HTTPS traffic for that game (including downloading the certificate). I need to have "Decrypt HTTPS traffic" turned on, otherwise it won't capture all the HTTPS traffic for the game. However, when that option is turned off, the game works fine, so is my web browser.

Is there anyway around this? I'd like to be able to capture HTTPS traffic normally without getting all these errors. Any help would be much appreciated.

No answers yet. Maybe you can help?

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