Hi, if your theme is old do you know if it is compatible with WordPress 4.4?
We can only troubleshoot issues with the plugins. But we rarely fix issues with compatibility because we have no control over the other plugins or themes.
Also since you mentioned that your theme is old, the more of a reason to update to a new theme or upgrade this theme if it is possible.
If you don’t carry out this it could cause more issues in the future.
This is my golden rule, always have the latest version of WordPress, latest version of the Theme and the latest versions of the plugins. When ever a theme or plugin is not updated or upgraded for a period of time I simply change and move on. This has helped me in the past and present avoid a lot of head aches.
My humble opinion.
Kind regards