Do you have the same version of Evostream Media server? i.e. you got 1 package and cleanly installed both to each machine?
Because what I think is there is a difference between the files in your web_ui from both machines. You could try copying the web_ui files from your local machine to your EC2 machine, totally replacing the ones in EC2. And also try to match the permisions of both directories from the ones in your local machine.