About the message
For your protection, 1Password will warn you if the link saved in your Login item begins with https:// but the page where you’re trying to sign in only begins with http:// (without the S). The S at the end stands for secure, and it’s always better to sign in securely.
What you should do
Visit the website saved in your Login item because it begins with https:// already, or try adding the s to change http:// to https:// yourself.
Click OK to navigate to the secure page.
If you got to the website from a bookmark you’ve saved, be sure to update the bookmark, so you’ll always go to the secure page.