Block Linked articles not showing on Product Detailed page

We're not sure what you mean by "Block Linked articles". If you meant the block "Related articles", then it is working okay in our version, just make sure you to select for Product Details page the Related block from Products section.
 
So if the problem remains, please provide more information about this problem either here or send a support ticket to support@viart.com.
 
Best Regards,
ViArt Support