This error usually comes when your site is calling the HTTPS URLs. But your site is loading on HTTP. Make sure that all URLs are HTTPS. Often it doesn’t affect your website’s functionality, but it can have adverse effects on your website’s SEO and user experience.
To fix a mixed content error on your WordPress site, you should first find out the URLs with insecure connections. You can visit this link and check your website Mixed content Error.
If you have correctly Installed SSL on your website, you will notice a padlock icon is next to your website’s URL in the browser address bar.
Your HTTPs/SSL settings are not properly set up, you will notice a broken padlock icon in the address bar.
Follow the below steps to Fix the Mixed Content error on the WordPress site.
1) First, Log in to your WordPress dashboard
2) Then, Go to Plugins and then search for SSL Insecure Content Fixer.
3) Install and Activate the plugin.
4) Now go to settings, choose capture all options, and recommend settings appear in red.
5): Save the changes, and now the site is reflected with Green HTTPS.