I have designed a layout in VSP Designer, but the print preview is different to the print result in my VertiGIS Studio Web app. What might be the problem and how can I solve it?

This is likely because the VSP Designer preview functionality is not using the VSP Engine Tool Print Task to generate a preview, but instead uses the native VSP Designer preview functionality with the Chromium printer. 

With the 5.28 release of VertiGIS Studio Printing, print preview uses the VSP Engine for previewing.