I'm using the ZendService\LiveDocx library, but when I run this on our stage server (Linux) and request the format to be docx, it returns me back a zip file rather than the actual document. The zip file consists of XML files describing the document. If I request the format to be PDF it works fine. This works fine in my local development environment (Windows 7) when I try to generate a docx document.
Any ideas why the LiveDocx service would return a zip file instead of the actual document?