Did you try deleting your preferences files in both AE and Pr? Or restarting the computer? You mentioned in the header that the files were corrupted, but I'm not reading in your comments that you got a "file corrupted" error message - what leads you to believe that the files are corrupted? Any other info you can provide would help us diagnose your problem. Thanks!
Deleting the preferences files in both AE and PR did not help. Same goes for restarting. No I don't get a error message at all. It just freezes at 1 percent and stays there forever. From my understanding if you can't load a save file it's either broken or corrupted. Correct me if I'm wrong.
I figured out that the problem may be that my footage is a dynamic link from Premiere (because Timewarp does not work for me in AE so I had to do it in Premiere). I did my effects in AE and now I'm in need of some cutting of the final clip. So I wanted to create a Dynamic Link from AE back to the Premiere Project - this is when stuff breaks. I can't render the AE dynamic link as it freezes after 1 second in Premiere. If I preview it it's also extremely laggy.
So, I think you can't create a Dynamic Link from Premiere to AE and then from AE to Premiere in the same Project, right?
Trying to export the files in AE now and then import them to the Premiere Project to do the cutting...
Have you tried the Render and Replace feature in Premiere?