Using Slide Cart with PageFly
Slide Cart is compatible and can be used with PageFly builder. However, it is important that you set the After add to cart button behavior within PageFly to Stay on the same page.
To do this, navigate to PageFly dashboard-> Pages-> Select the product-> Click the add to cart button-> And under the After add to cart dropdown Select Stay on the same page.

If you need help or Slide Cart is not working, do not hesitate to reach out.