A non-empty PSR-4 prefix must end with a namespace separator
composer-php, psr-4
Solution
Someone made a comment but removed it. He mentioned I was missing `\\` at the end of `Acme\\models`. `Acme\\models\\` will get rid of the message and work as it should.
Problem
I'm trying to setup PSR-4 with Composer but I'm just getting `A non-empty PSR-4 prefix must end with a namespace separator.` My `autoload` in my `composer.json` looks like this: ``` "autoload": { "psr-4": { "Acme\\models" : "app/models" } }, ``` `app/models` is empty. What am I doing wrong? How can I fix this?