I’ve fixed all of the homepage images to link “https”, but I found one image it’s hide in back and I can’t delete it:
Mixed Content: The page at ‘https://www.iegoart.com/shop/’ was loaded over HTTPS, but requested an insecure image ‘https://www.8theme.com/demo/xstore/electronics/wp-content/uploads/sites/22/2016/11/newsletter-bg.jpg’. This content should also be served over HTTPS.