12 hours ago, NemoPS said:

In the site's root, just login with ftp of use the filemanager in cpanel to find anything starting with "admin"

I don't have a folder called admin in my root. I only have admin folders within my img and js folders. I do have a backoffice folder.

After switching on debug mode, when I go to my site(http://shop.sheepdog-training.co.uk/backoffice/) it says:

Notice: Undefined index: adminnotfound in /homepages/9/d461631471/htdocs/clickandbuilds/PrestaShop/shop/classes/Dispatcher.php on line 335

Fatal error: Uncaught Error: Class name must be a valid object or a string in /homepages/9/d461631471/htdocs/clickandbuilds/PrestaShop/shop/classes/controller/Controller.php:134 Stack trace: #0 /homepages/9/d461631471/htdocs/clickandbuilds/PrestaShop/shop/classes/Dispatcher.php(359): ControllerCore::getController(NULL) #1 /homepages/9/d461631471/htdocs/clickandbuilds/PrestaShop/shop/backoffice/index.php(58): DispatcherCore->dispatch() #2 {main} thrown in /homepages/9/d461631471/htdocs/clickandbuilds/PrestaShop/shop/classes/controller/Controller.php on line 134

9 hours ago, NemoPS said:

In the site's root, just login with ftp of use the filemanager in cpanel to find anything starting with "admin"

I don't have a folder called admin in my root. I only have admin folders within my img and js folders. I do have a backoffice folder.

When I go to my site(http://shop.sheepdog-training.co.uk/backoffice/) it says 

This page isn’t working

shop.sheepdog-training.co.uk is currently unable to handle this request.

9 hours ago, NemoPS said:

In the site's root, just login with ftp of use the filemanager in cpanel to find anything starting with "admin"

I don't have a folder called admin in my root. I only have admin folders within my img and js folders. I do have a backoffice folder.