Error "expected Array to be a Hash: properties"

[EthanOSHOP]

When I try to add to cart, this happens.
url is wintheoryco.com

[ThePixelEdge]

Hello @EthanOSHOP 
I belive that this issue has solved now, Let us Know If you need further assitance on this. 

[thepinkcookie]

How was the issue solved? We're experiencing the same thing. Our website is www.buttercakeshoppe.com. Thank you.