Hello Mike,
Thank you for your feedback and a detailed explanation of the issue. We can confirm that currently there is an issue when using Fiddler alongside VPN through Cisco AnyConnect. The team is currently estimating the issue and you could expect a fix that will provide compatibility with Cisco Anyconnect in one of the upcoming releases of Fiddler Everywhere.
Meanwhile, try to resolve the issue by applying this solution.
Once again thank you for your interest in Fiddler.
Regards,
Nick Iliev
Progress Telerik
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