There is no minimum number of posts required in order to use the 'media' section. It just doesn't work well. Many, many members have complained about it.
What Josh needs to see is a screen shot of what you get when you try to post in 'media.' Then send that screen shot to the email down at the bottom of the home page where it says "contact us" with the explanation about not being able to post in 'media.'
Here is a copy of the error to save some time maybe someone can forward it to Josh - the error message is not very informative. The album was working at some point as I have an album with several pictures in it.
View attachment 189381