PSD files incompatible with Elements 14

I'm working with a printer who designed me a template greeting card using an updated version of Photoshop CS. He saved the file as an 8-bit PSD and also saved it to be compatible with previous versions. When I try to open it in my Photoshop Elements 14, the file opens but I cannot access the layers. What needs to be done to resolve this apparent compatibility issue or does PS14 lack the ability to open this at all?