Common Problems – iOS

Here are some of the common issues people face when working with iOS and Charles. Details on how to fix these issues has also been included.

Time Outs

The app or browser keeps timing out

Check if the local IP address of your Mac has changed

If it has changed, it means your device can no longer talk to your Mac. Essentially your iOS device has no internet connection!

Access Denied

My IP address hasn’t changed and I still can’t see traffic from my device on Charles

If you see a message in the bottom left-hand corner of Charles about ‘Denying access ….’, the fix is actually quiet straightforward

Restart Charles. Return to your browser/app and reload the page/screen

Go back to Charles and you should now see a dialog (see next screenshot below) about accepting a connection from you device

Click ‘Allow’

Why did this happen?

This error can occur if you dismiss the dialog (by clicking the red circle) or accidentally click ‘Deny’ button

The dialog message says “If you deny this you will not be asked again for this host address until you restart Charles”.

Managing local IP address

The ‘Access Control Settings’ screen lists the local IP addresses of all devices that can communicate with your instance of Charles

Trust Root certificate

I’ve installed the Root certificate and ‘Enabled SSL Proxying’ but the Response is empty or blank

If you have decrypted the SSL traffic but the Response is empty, it may mean you haven’t trusted the Root certificate on the iOS device

How to fix it?

Settings -> General -> About -> Certificate Trust Settings -> enable the toggle for the Root certificate

Using a work laptop

I’ve done everything and Charles STILL doesn’t connect

If you are using a work laptop and Charles still isn’t working, check if there is any pre-install software that could stop Charles from working e.g. Zscaler, Cisco Umbrella

If allowed, turn off each application one by one to see if that resolves the problem

The Zscaler icon is highlighted in the adjacent screenshot

3 thoughts on “Common Problems – iOS

      1. Thanks for your prompt reply!!

        I tried all the steps as mentioned in above shared link however unfortunately unable to fix it.


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