Previewing prototype doesn't work

Hello, I’m trying to play a prototype (a cloud file) that I made in Lunacy, however when I press the play button on the top right corner, it sends me to the preview on my default browser (which is Safari) but all I get is a grey screen and nothing else. I’m currently on Lunacy 8.5.1 and the OS is macOS Catalina version 10.15.7

here’s what happens when I play the preview


Can you PM me the link to your prototype?