To access the share point files in Qlik server, where you are trying to deploy should be in same domain as that of share point and also the service account you are using should have the full access to the required share-point portal.
May be, these satisfy when you run it from local Machine and its doesn't when you run from server.
The URL should not be like 'http://servername/foldername/filename'
and it should be like '\\servername\foldername\filename.extension'.
QlikView cannot recognize the URL with HTTP for SharePoint.
In the above post the path is:
but it should be like:
then it will work.