failed to upload due to an error

Hi, I love this plugin, its exactly what I need for a client. Im using WP-DR v2. and I am getting the following error when trying to upload an image. I double checked the permissions on my wp-content/ folder. And I can upload files through the Media section in wordpress.

“11c079ea81982a7a09a4b442c2368f6c.png” has failed to upload due to an error
Unable to create directory wp_content/uploads/2015/04. Is its parent directory writable by the server?

Thanks in advance.

https://www.ads-software.com/plugins/wp-document-revisions/