This message is generated when the value of the AxesEdge option does not have the expected form.
The value of the AxesEdge option is expected to be None, Automatic, or a list with three elements.
If the value is a list, each element of that list describes the axis edge in a particular direction. Each element should be None, Automatic, {1,1}, {1,-1}, {-1,1}, or {-1,-1}.
Off[message] switches off the message; On[message] switches it on. For example: Off[AxesEdge::axedg].