OK, so here's the deal. There is a folder that is created in wp-content/uploads called "marketimages".
This folder (for me anyway) was not set with "777" permissions.
When I tried to change the permissions, it did not let me, so I deleted that foer, created another one called "marketimages" and set the permissions to "777".
It is working now.
For whatever reason, I would hope that in the future, this will be fixed in the install of MK. Maybe it's a specific server thing.
Anyway, that's my solution.