Can not preview my frame?

Hey everyone, I am new to Figma and I have just started designing my site, I have selected the frame of my project but I cannot preview. I have screen shot the notice that comes on. Can anyone shed some light onto this please?

Hey Hayley, welcome to Figma Community!
Can you please share a quick screenshot or video recording when you intend to do it?
You should be able to Preview or Present, please make sure that your design is within the Frame.

More information in our guide here: https://help.figma.com/hc/en-us/articles/360040318013-Play-your-prototypes#h_01HER6XXFTX7SWE6EH2005DVZP