Thanks for the response. So I deleted the extensions cache, like you said and just to make sure, I did it a second time. The second time it said that no such file or folder exists. The strange thing is that when I typed in the first line to verify my permisions, it said that no such file or folder exists. So I typed in the second line, to use diskutil to repair permissions. It said that it finished and was successful. I am going to reboot now, we will see what happens. Thanks for your help!