Error loading block: Invalid parameter(s): attributes

When using JetEngine’s “Dynamic Image” block I get the error Error loading block: Invalid parameter(s): attributes as long as the Pattern CSS plugin is active, even if no other options for that block have been configured (ie no custom css set or any other options picked, I just drop the block onto the page and get that error). The error disappears when I de-active Pattern CSS.

Any ideas what might be going on?