Shopper Issues
Storefront shoppers may encounter the following errors when using a storefront.
Error message: 'The content type is not supported' 
This message is displayed when a shopper uploads a file for an uploadable product. Two causes are possible:
The shopper overlooked the drop-down menu at the top of the upload window and attempts to upload a TIFF or JPEG file even though the menu is set for uploading a PDF file.
The shopper is trying to upload an unsupported file format. An example of this is attempting to upload a JPEG2000 file even though this is not a supported file format.
Error validating a variable data product 
Troubleshooting orders 
doc. version 6.0.4