White line on the side of mobile display of modified Spirit Theme

Hello there,

So when viewing my site on a mobile device, there's this white line on the right hand side of the screen. if i choose "desktop view" from the settings menu on the smart phone, it rectifies this.

my friend google tells me that it's possibly this: " There was an extraneous position: relative on an element in the topbar"

How do I fix this?