How nice to see someone having the same issue here.
This issue does not appear in every case, apparently.
With the last schedule (same report and same config) it worked nicely... exactly once.
The report never created an output file ever again.
In other report configurations it's working, though.
I was trying to get a list of all user assignments on every machine we've got.
When I use the option to output the file using date and time factors for the name -> data.csv
Providing a specific name and checking the box for date/time appendage results in -> data.csv
Apparently it's working with different EE credentials now.