This is happening with both Google Chrome and Microsoft Edge browsers.
If you click the "i" with a circle around it that is to the left of the web address:
Google Chrome says:
...Your connection to this site is not secure.
You should not enter any sensitive information on this site (for example, passwords or credit cards), because it could be stolen by attackers.
Microsoft Edge says:
Be careful here
Your connection to this website isn't encrypted. This makes it easier for someone to steal sensitive information like passwords.