Couldn't connect to web proxy via Safari [iPhone/iPad] via any Proxy client on PC

Question

When I connect my iPhone to the WiFi, running a proxy using Fiddler or Charles, it works. I set up my iPhone or iPad with proxy 8888 and of course the IP of my PC.

An error occurred stating:

problem communicating with the web proxy server http

This was working fine last week, however it just started happening today. How can I resolve this, or pinpoint the issue?

Here is the solution that I tried so far and it's not working yet:

1. Flash the DNS in cmd
2. restore the firewall and reallow all the application again
3. reboot the PC and the iOS devices
4. re-configure the IP to make sure isn't duplicate.
5. reboot the router with cycling the router for 10 minutes

Answer 1

the solution was nothing just reboot my computer and all worked fine