Getting messages that DU is not secure

[Marthe48]

2. I open Google, have DU as one of the shortcut buttons

I click on that to open DU. The URL has the wired Ethernet connection symbol. No https://

I usually just leave the DU window open and I'm signed in. Sometimes, my computer is slow, so I close all the windows and reopen. I don't think what I've noticed is because I clicked on a link or a post.

I'm going to assume the friend has high security settings. I'll delete my shortcut button and reenter it,, making sure the beginning is https://

Thank you.