Description
Custom tabs are not working in mobile version, there is a blank page with error
Block doesn't exist:items_tabs
 
Solution
http://www.viart.com/downloads/block_product_details-4.2.mobile.html.zip
 
Download the file above and extract 'block_product_details.html' in /templates/mobile folder.
 
Please remember fix should be present in the mobile version of the site. So if your mobile version is located in sub-directory of the main domain called "mobile" then file should go in folder:
 
/mobile/templates/mobile