I am trying to do a debug session on an App (Android) by monitoring the outbound/inbound HTTP traffic on Andy emulator.For SSL traffic I get following error : Failure: SSLHandshake: Unsupported curveId: 29

In the past I was not receiving above error using that app .Could you guys tell me what this error means and how to fix it?Is there any problem within the app that causes to receive SSL error? Thanks


See the Android section in their documentation https://www.charlesproxy.com/documentation/using-charles/ssl-certificates

You need to add a network security config file for Android N and higher devices.


From Android N+, we have to add the Certificate in your app in network_security_config.xml and manifest.xml in order to intercept the HTTPS Traffic.


<!-- Trust user added CAs while debuggable only -->
<certificates src="user" />


<?xml version="1.0" encoding="utf-8"?>
<manifest ... >
<application android:networkSecurityConfig="@xml/network_security_config" ... >

Here is the quick tutorial: https://docs.proxyman.io/debug-devices/android-device

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