PHP Deprecated

This is an image of my page and the error that is showing up.

https://gyazo.com/fc652c864b6ba44c5c5f0e78a42f27e7

If you need to get into the site. I will need to know what approximate time and date you can look at the problem so I can make sure the server is turned on.

This is the page I opened and put the related pages in.

https://gyazo.com/98205bbadf912ede32c5bbce6f891108

The page I need help with: [log in to see the link]