carissa_lyn​ In my case, I ran After Effect on Windows Server 2012. This specific installation of windows don't come with Windows Media Player. So when I launched after effect, 3 media core plug-ins were unable to load. (I needed importquicktime in my case) When you go to your Server Roles, you can Add Features to your OS. You then have to go trough the wizard (default next next next....) until you reach Add Features. From there, choose: User Interface and Infrastructure > Desktop Experience. Once Desktop Experience is installed, windows will let you load the plug-ins. For your specific OS, installing the windows media player framework may be different. Also, this apply only to Windows machine that ran into this specific issues. ... View more

-- SOLVED -- Same issues. Searched everywhere to find such a simple solutions. It is likely you do NOT have Windows Media Player installed. (Well that was the case for me since I am rendering on Windows Server / virtual machine in the cloud) SOLUTIONS: Server Role > Add Features > User Interface and Infrastructure > Desktop Experience Done. Everything work. ... View more