Collage demo broken

I wanted to try out the collage demo, but it is not working. There appear sveral errors in the console:

https://fancyproductdesigner.com/wp-content/plugins/fancy-product-designer/assets/templates/productdesigner.php 403

FancyProductDesigner-all.min.js:8 Uncaught TypeError: Cannot read property 'addCanvasImage' of undefined

    at FancyProductDesigner._addGridItemToStage (FancyProductDesigner-all.min.js:8)

    at HTMLDivElement.<anonymous> (FancyProductDesigner-all.min.js:8)

    at HTMLDivElement.dispatch (jquery.min.js:2)

    at HTMLDivElement.v.handle (jquery.min.js:2)

https://fancyproductdesigner.com/product/collage/