Uploading media installed in MAMP


Hi, I’m a new user trying out Omeka S at home running on MAMP (while I wait for it to be installed at my university). I got it going and created some pages but when I try to upload Media from my hard drive I get “Omeka S encountered an error”. That’s it. Same if I try to use a YouTube link. Any advice welcome. I had none of these problems using the Sandbox.