Mobile access

Hi, I had problems where I would get my old website design when accessing my domain on a mobile device, so I deleted a “mobile” folder in my root directory files, and now when I access my site through a mobile device, I get a blank page that says “authentication error”. However if I access a post or page other than the homepage on a mobile device, I can see it no problem. My web-host has been as much help as a pair of socks on this subject. Is there a fix for mobiles to be able to access the homepage?

I’m posting on here because I’m not sure if this theme creates any files in a folder named “mobile”, because if it does then I’d have deleted it. And if so, how can I recover/replace it?

Thank you and sorry if I’m posting in the wrong place.