Reorder Menu Not Working in WordPress 4.1

Having an issue trying to reorder a custom admin menu. When I click "Reorder Menu", the menu items rock back and forth like normal, but when I attempt to move any of the items by clicking and dragging, they do not move and it just highlights the text. I have gone to the Twenty Fifteen theme and deactivated all of my plugins except for Ultimate Branding and WPMU Dev Dashboard and it still does the same thing.

This is the only site where I have WordPress 4.1 installed and this works on all my other sites that I have not upgraded yet.

Thank you for your help.