Images not showing up in Photoshop 2020 on Mac

Hi there, 

I used to use photoshop a lot but haven't needed to for some time. I have an adobe subscription and have updated it and not sure if it's because I have changed the setting by mistake or if I am doing something wrong. When I open a new photo to work with (wanting to delete a background) I can see the image in my layers but not on my work area (or whatever you call it) Can anyone please help.

Thank you Tracey 

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