Error message on my son's MacBook Pro err_proxy_connection_failed

Using home WIFI, Safari works on my son’s laptop, but Microsoft Edge and Google Chrome doesn’t work and it says “looks like there’s something wrong with the proxy server or the address is incorrect. Error message is ERR_Proxy_connection_failed (all caps). (Checking the proxy address it says go to Applications- Networks- Advanced- proxies and deselect any proxies that have been selected). Picture below. I have played with the settings and it’s still not working.

It doesn’t work at school either. The IT department has said “As far as what I’ve seen on Joseph’s machine and our research has told us, the issue lies with Norton Antivirus’ VPN. It’s a shame because the school does indeed recommend students have antivirus protection of some description installed on BYOD devices. The issue we’re running into with this one is that Norton utilises a VPN on some level to do what it does. It looks to me like Norton can still operate and function without the features that require the VPN to be active and I would suggest we start with that.

I hope that makes sense. Basically, let’s not jump right ahead and say get rid of Norton - please suggest Norton be configured to not use any VPN features and see how we go.”

I checked and the VPN on Norton is not on but if anyone can give me instructions on how to “configure to not use any VPN features” that would be appreciated.

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What is the error message you are seeing? ERR_Proxy_connection_failed

If you have any supporting screenshots, please add them: See picture below