Today I upgraded a Wodpress theme for client website. But after the upgrade got a warning for Mixed Content as shown below in web browser’s error console.
Mixed Content: The page at 'https://www.sitename.com/' was loaded over HTTPS, but requested an insecure stylesheet 'http://fonts.googleapis.com/css?family=Lato:300,400,700'. This request has been blocked; the content must be served over HTTPS.
Here is the steps I followed to fix the issue
Added theme files to Git
git init git add .
Then searched for google font
git grep google
Here is output
Then I edited the default.css and updated the google font url with https