Hello,
Please try these solutions:
https://managewp.com/wordpress-ssl-settings-and-how-to-resolve-mixed-content-warnings
https://wordpress.org/plugins/ssl-insecure-content-fixer/
Concerning the outdated files, this issue will be fixed in the next update. You don’t need worry about this notice. It won’t affect your site work.
Thank you.
Regards,
Eva Kemp.
