Clicking the Generate XML Button on a German Tax Report generates an error: You do not have privileges to view this page

This means that the User's role is not added as an Audience in the Script Record named: 3641 DE Online Filing.

To fix this:

1) As the Administrator, Navigate to Customization > Scripting > Scripts

2) Navigate to the bottom of the page > Type = Suitelet

3) Click the Deployments link beside - customscript_3641_onlinefiling_main

4) Edit customdeploy_3641_onlinefiling_main 

5) Under the Audience tab > Press Ctrl key + click   Custom Role

6) Save