Error occurred while fetching .NET Core server [35909] status. Error message: getaddrinfo ENOTFOUND localhost

[oli]

When trying to start Fiddler Everywhere on my Mac I get this:


18:21:10.268 › [Product information] Progress Telerik Fiddler 0.5.0
18:21:10.288 › [System information] Darwin MacBook-Air.local 18.7.0 Darwin Kernel Version 18.7.0: Tue Aug 20 16:57:14 PDT 2019; root:xnu-4903.271.2~2/RELEASE_X86_64 x86_64
18:21:10.408 › Initializing splash screen.
2019-11-25 18:21:10.593 Progress Telerik Fiddler[25804:80887] *** WARNING: Textured window <AtomNSWindow: 0x7fd2504d1b10> is getting an implicitly transparent titlebar. This will break when linking against newer SDKs. Use NSWindow's -titlebarAppearsTransparent=YES instead.
18:21:10.647 › Attempting to run server - 5 attempts left.
18:21:10.648 › Generating random port.
18:21:10.648 › Trying to start server at port [35909].
18:21:13.489 › Fetching .NET Core server status.
18:21:13.510 › Error occurred while fetching .NET Core server [35909] status. Error message: getaddrinfo ENOTFOUND localhost
18:21:13.511 › Attempting to run server - 4 attempts left.
18:21:13.511 › Generating random port.
18:21:13.512 › Trying to start server at port [28828].
18:21:15.757 › Fetching .NET Core server status.
18:21:15.761 › Error occurred while fetching .NET Core server [28828] status. Error message: getaddrinfo ENOTFOUND localhost
18:21:15.761 › Attempting to run server - 3 attempts left.
18:21:15.762 › Generating random port.
18:21:15.763 › Trying to start server at port [57314].
18:21:20.045 › Fetching .NET Core server status.
18:21:20.051 › Error occurred while fetching .NET Core server [57314] status. Error message: getaddrinfo ENOTFOUND localhost
18:21:20.051 › Attempting to run server - 2 attempts left.
18:21:20.052 › Generating random port.
18:21:20.053 › Trying to start server at port [57415].
18:21:24.882 › Fetching .NET Core server status.
18:21:24.887 › Error occurred while fetching .NET Core server [57415] status. Error message: getaddrinfo ENOTFOUND localhost
18:21:24.887 › Attempting to run server - 1 attempts left.
18:21:24.888 › Generating random port.
18:21:24.888 › Trying to start server at port [10561].
18:21:31.871 › Fetching .NET Core server status.
18:21:31.876 › Error occurred while fetching .NET Core server [10561] status. Error message: getaddrinfo ENOTFOUND localhost
18:21:31.876 › Attempting to run server - 0 attempts left.
18:21:31.877 › Maximum number of attempts reached - quitting application.
18:21:31.900 › Generating random port.
18:21:31.900 › Trying to start server at port [55810].

My hosts file is the default one so I'm not sure what the error cause is.

[Eric R | Senior Technical Support Engineer]

Hi Oli,

We are currently investigating issues with Fiddler Everywhere proxy settings. More details are available at the Not seeing any records on Mac feedback Bug Report. I have increased the priority by adding a vote for you and encourage following the public Bug Report to receive future updates. Although, I would like to gather more information from you to add to the Bug Report. Can you provide the following information?

1. OS Version

2. How are you launching Fiddler Everywhere and do you receive a Password prompt?

3. Provide screenshots of your Network Proxy Settings before and after starting Fiddler Everywhere? 

4. Do you have a Wifi and an Ethernet Adapter?

5. Are you using a VPN or Third-party Firewall?

In the meantime, please let me know if you have any additional questions. Thank you for using the Fiddler Forums.

Regards,

Eric R | Technical Support Engineer
Progress Telerik