Unable to send or receive emails

I am unable to receive or send emails since Friday 11/13/2020.
I can receive emails on my MAC and my Android phone but not on
my Windows 10 laptop. So apparently the server must be working.
I have checked em client settings and anti virus settings with no success.
I have received an error message and have attached a screen shot.

Screenshot (40)|690x387

You could try closing VPN, if active, and anti-virus software, if active.