First time with this error - Inconsistent accessibility

Question

This is my first time working with interfaces and proper namespace structure. When I compile I get the error below, I have no idea what it means. Any searches I do shows up

Answer 1

The problem is IOperatorRequest is probably internal.

UPDATE

What I said is correct. Omitting modifier makes it internal.

Classes and structs that are declared directly within a namespace (in other words, that are not nested within other classes or structs) can be either public or internal. Internal is the default if no access modifier is specified.