Please make sure you subscribe to comments so you don’t miss my reply.
Also send a copy of your child theme with the code you installed OR FTP hostname, username & password OR cPanel login URL, username & password AND WordPress wp-login.php username and password.
Without full access to your server and WordPress installation, it may not be possible to install the code and make sure its working correctly.
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Alternatively, post your question using Facebook messenger and i’ll try and get back to you before the 29th.