Issue importing wireframes from prototype into presentation mode

Would someone mind taking a look at my wireframes? I am having difficulty viewing my wireframes in presentation mode. I have grouped my frames together and made multiple node connections from one screen to the next but when I attempt to preview the prototype in presentation mode all I see is a grey blank screen? I have been working on and researching this issue since yesterday and continue to experience this issue? Any suggestions or advice is very much appreciated. Thank you.