After effects won’t open on Mac

Hello.

I just started using adobe suite and it was working great until a few days ago when I decided to move my Dropbox location to the external drive. 

Since then I keep getting a message saying "The Common Extensibility Platform (CEP) suite couldn't be loaded." This happens only to after effects and encoder. 

I uninstalled the app and reinstalled, tried a different account, and gave "read and write" access to all the adobe apps. 

It's still not working, and I need a solution. Could someone help me please?