NPrinting 19: E-mail sending fails if a report has empty data

An NPrinting tasks contains some different report, each report can have specific filters.

The reports are sent by email to different users, but they can also be published on a local folder or to the NewStand.

If all generated reports have data, they are sent by e-mail correctly.

If some of the reports (but not all) have no data, the e-mail is not sent for any users.
No report is sent even if some of them are produced, as you can see in the local folder where the are saved.

The task ends with a Warning sign (expected) but with this error message (incorrect):
"Failed to send e-mail for bucket 946229bd-c00e-49f2-a960-b85b8a96f9c7 to xxx.xxx@xxx.com. ERROR: Value cannot be null. Parameter name: value".

Environment:

• NPrinting 19 February, April, June and September release