Sounds like you've got corrupt activation files. Go to Premiere Pro and choose Help > Deactivate. Close Premiere Pro. Relauch Premiere Pro and choose Help > Activate.
See if that helps.
Thanks for the advice but it didnt work for some reason: I got "deactivation failed" message.
Hey! I was googling Media Pending to figure a solution for an endless state in Premiere Proc CC, when this site showed up.
I´d just like to share that this might fix it if one encounter that problem (on Mac):
1. Close Premiere Pro
2. Open Terminal
3. Paste: mv ~/Library/Application\ Support/Adobe/Premiere\ Pro/ ~/Library/Application\ Support/Adobe/Premiere.old
4. Hit enter, close Terminal and retry Premiere
This solution should force Premiere to rebuild some settings regarding plug-ins. I´ve worked for days trying to figure this out, and just wanted to share ^^,
Thanks for the Trick Seflems, it works fine for me and saved my Day. I was reinstalling the Premiere and the same error, but with your solution it works great!!!!! THANKS