Check the user license!
The user have to sure that he have the right "Qlik Sense License" -> "Professional " and not "Analyzer"
For the Reporting Service the user need a Professional.
Professional and Analyzer Users license
A Professional and Analyzer Users license is composed of Professional and Analyzer access types.
Professional access (user-based) is allocated to an identified user to allow the user to access streams and apps within a Qlik Sense site. The professional access is intended for users who need access to all features in a Qlik Sense installation. A user with professional access can create, edit, and publish sheets or apps, and make full use of the available features, including administration of a Qlik Sense site.
Analyzer access is allocated to an identified user to allow the user to access streams and apps in the hub. The analyzer access is intended for users who consume sheets and apps created by others. A user with analyzer access cannot create, edit, or publish sheets or apps, but can create and publish stories, bookmarks and snapshots based on data in apps. The user can also create bookmarks, print objects, stories, and sheets, and export data from an object to Excel.