It seems that sometimes trying to post a new article on steemit can result in you getting the following error message displayed:
> account exceeded maximum allowed bandwidth per vesting share account
As a result your post is not being published on steemit, but the solution is pretty simple.
All you have to do is wait a bit and try to Post again, if it does not work wait some more and try again. In a minute or two you should be able to successfully post your publication on steemit, so do not get worried. All you have to do is be patient...
The error message is a direct result of something happening on the seemit blockchain, so giving it some time usually solves the issue and in a couple of minutes everything regarding posting should be back to normal.