Assertion Failed: Attempting to inject an unknown injection: 'service:media'

I keep getting this error no matter what I do. I even copied the examples and same thing. I tried having a completely empty table, as well as one only with columns and empty rows. I still get the error. What is this service media - i see it is referenced in one of the mixins - and how do i get it and why do i need to have it if it isn't in the examples?