Your connection is not private error Msg in Google Chrome?

Hi…for me this is the first time this as happened. I did switch off 'Enable HTTPS scanning’ within ‘Web Shield’ of Avast & it seemed to work. Obviously its a Chrome problem because all is fine with other browsers & it seems to affect alot of people after searching. Is there anything else I should do? The date & time are correct which is mentioned in some fixes. Has this occurred with a recent upgrade?

Appreciate any help

Thx