HI Aalsysadmin,
What platform do you run it from? I am running it from OSX-Yosemite, mysql-5-6-21, Apache-2, PHP-5-5-14.
My initial install worked and all banners could be uploaded, but now I am having this same message on 4 different Yosemite platforms.
No one replied so I guess its just you and me with this issue.