So I'm on Blender 2.8, and I'm having the weirdest problem right now. I select an object and go into edit mode, but the wireframe doesn't appear, and I can't actually edit anything! There are some times where i can't select the object directly in object mode, and actually need to select it in the hierarchy too. I suspect this is an issue with either the collections or layers, because I tried the "m" shortcut and was thrown off when it asked about collections instead of layers. Anyone know how to help?
I guess overlays are turned off. Check in the top right of your 3D viewport (by default) and make sure following icon is blue: