Traceback (most recent call last):
  File "/usr/share/system-config-printer/system-config-printer.py", line 1235, in on_btnApply_clicked
    err = self.apply()
  File "/usr/share/system-config-printer/system-config-printer.py", line 1244, in apply
    return self.save_printer(self.printer)
  File "/usr/share/system-config-printer/system-config-printer.py", line 1414, in save_printer
    printers = cupshelpers.getPrinters (self.cups)
  File "/usr/share/system-config-printer/cupshelpers.py", line 242, in getPrinters
    printers = connection.getPrinters()
IPPError: (1282, 'server-error-service-unavailable')