I am having a similar issue. I built a website in Canva, connected it to my squarespace, and then realized that Canva couldn't provide all of the functionality that I wanted. So I started over in Squarespace and tried to reverse-engineer all of the steps that I had taken to connect Canva. Now my site says not secure. www.ask-hillary.com
It has been well beyond 2 weeks since I made any real changes.