We have made a complete list of errors that you might encounter, and how to solve them yourself.
If the print jobs are "Queued" click here: https://support.princh.com/print-jobs-are-stuck-in-queued
If the print jobs are stuck in "In progress" click here: https://support.princh.com/print-jobs-are-stuck-in-progress
If the printer jobs go directly to "Error" click here: https://support.princh.com/print-jobs-are-stuck-in-error