Thank you for the answer. I’m new to SSL, so sorry if the question sounds silly. Having no green lock means that SSL doesn’t work on my website? The thing is that my website loads properly with “https”. When I change my URL address in wordpress from http to https, then all my pages load with a green lock except my homepage. I just don’t know what to do.
The wp-config.php is in the same directory as index.php. It’s quite often called public_html.
Once you find the file, your FTP program should have some sort of text editor that will let you edit a file on the server. You can put those three lines somewhere in the middle of the wp-config.php file.
Out of curiosity, which Crypto-> SSL mode are you using? Flexible, Full, or Full-Strict?