hello every one i have installed Fiddler on my win 10 1809 PC .. although i have installed the https certificate it still doesn't work !! at the first pic the error is shown and at the second one when i tried to fix it
Try this :
- Launch Fiddler
- Click menu Tools > Options, HTTPS tab, ensure you see "Certificates generated by CertEnroll engine"
- Click Actions > Reset All Certificates and wait, accepting all prompts. You might want to select "Decrypt HTTPS traffic".
- Click OK
Source : Reset Fiddler’s HTTPS certificates.
In the post Fiddler causes my Internet access to stop working, an admin answers:
99% of the time, this is caused by running a 3rd-party firewall which is blocking access to Fiddler.
1% of the time, this is caused by plugging a Windows Phone device into your PC over USB. The Windows Phone team steals Fiddler's default port (8888) from it.