Web threat secured message on every opened web page

Whenever I open a new page (on Chrome), I get the same popup, saying:

“Web Threat secured”
We’ve blocked a threat URL:Phishing on hXXps://optimizationguide-pa.googleapis.com/v1:getHints from being downloaded

Is this an actual virus or some other issue?

First modify your url link as I have in the quoted text, posting an active link to a suspect site could put others at risk.

Were you intending to visit this site ?

If not start by clearing your browser cache and cookies,including 3rd party cookies and restart your browser.
If that resolves it you should be good to go.
If it doesn’t try running your browser with add-ons disabled.

If that resolves it, have you added or updated any add-ons ?
If so try disabling that add-on - and restart and try again.

If still not resolved and you are using Chrome based browser - try this suggest by Avast Team member ‘lukor’
What about page notifications? Here: chrome://settings/content/notifications ? Do you have all cleared?

Probably a “fail to connect” issue.

polonus