I've created a custom attribute which uses Image/ File as the type, while editing a page when I go to Choose new file in the dashboard for the attribute the filemananger doesn't load. The mouse cursor changes to the loading icon and an ajax event is fired called search but nothing happens...

This is the response i'm getting from the ajax call that failing

"{"error":{"message":"Doctrine\\Common\\Proxy\\AbstractProxyFactory::getProxyDefinition(): Failed opening required '\/Applications\/MAMP\/htdocs\/www.eastkilbride.internal\/application\/config\/doctrine\/proxies\/__CG__ConcreteCoreFileStorageLocationStorageLocation.php' (include_path='\/Applications\/MAMP\/htdocs\/www.eastkilbride.internal\/concrete\/vendor:.:\/Applications\/MAMP\/bin\/php\/php5.6.10\/lib\/php')"},"errors":["Doctrine\\Common\\Proxy\\AbstractProxyFactory::getProxyDefinition(): Failed opening required '\/Applications\/MAMP\/htdocs\/www.eastkilbride.internal\/application\/config\/doctrine\/proxies\/__CG__ConcreteCoreFileStorageLocationStorageLocation.php' (include_path='\/Applications\/MAMP\/htdocs\/www.eastkilbride.internal\/concrete\/vendor:.:\/Applications\/MAMP\/bin\/php\/php5.6.10\/lib\/php')"]}"

Anyone know whats going on here?

I'm working on concrete version 5.7.5.3