Something Went Wrong

[sorynbassarov]

Http failure response for https://identity.getfiddler.com/oauth/token: 0 Unknown Error

You have the following upstream proxy set in OS settings: { "mode": "fixed_servers", "pacScript": null, "proxyRules": , "proxyBypassRules": "<-loopback>,.apple.com,.cdn-apple.com,.apple-cloudkit.com,.icloud.com,.itunes.com,.mzstatic.com" } Try the following: Remove the upstream proxy from OS settings and restart the app. Whitelist the Fiddler APIs: https://*.telerik.com https://*.getfiddler.com https://fiddler-backend-production.s3-accelerate.amazonaws.com Interested in using Fiddler Everywhere offline? If yes, copy the information below and send it to our support.

Operating System: macOS 14.5.0 Has Jamf Connect installed: False

[NickIliev]

Hey @sorynbassarov

It looks like your macOS was previously set to use an upstream proxy ("mode"="fixed_servers"), but it was not correctly removed. Try the following:

• Stop the Fiddler Everywhere application.
• Open "Settings" on macOS.
• Open the "Network" tab and select the active network adapter.
• Go to "Details" and then lead to the "Proxies" tab.
• Reset the settings for "Web Proxy (HTTP)" and "Secure web proxy (HTTPS)" to their defaults. If there was no other upstream proxy, you can directly toggle them OFF.
• Start Fiddler Everywhere.

The above approach is described in details in the following KB article: https://docs.telerik.com/fiddler-everywhere/knowledge-base/troubleshoot-mac-proxy-settings#solution