Description of problem:
use hp-setup to add a printer

Version-Release number of selected component:
hplip-3.17.4-3.fc26

Additional info:
reporter:       libreport-2.9.1
cmdline:        /usr/bin/python3 /usr/bin/hp-setup
crash_function: open
exception_type: base.g.Error
executable:     /usr/bin/hp-setup
kernel:         4.11.6-301.fc26.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
setupdialog.py:1111:readwriteFaxInformation:TypeError: critical(QWidget, str, str, buttons: Union[QMessageBox.StandardButtons, QMessageBox.StandardButton] = QMessageBox.Ok, defaultButton: QMessageBox.StandardButton = QMessageBox.NoButton): argument 5 has unexpected type 'StandardButtons'

Traceback (most recent call last):
  File "/usr/share/hplip/ui5/setupdialog.py", line 1102, in readwriteFaxInformation
    d.open()
  File "/usr/share/hplip/base/device.py", line 1185, in open
    raise Error(ERROR_DEVICE_NOT_FOUND)
base.g.Error: ('Device not found', 2)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/share/hplip/ui5/setupdialog.py", line 1303, in NextButton_clicked
    self.showAddPrinterPage()
  File "/usr/share/hplip/ui5/setupdialog.py", line 729, in showAddPrinterPage
    self.readwriteFaxInformation()
  File "/usr/share/hplip/ui5/setupdialog.py", line 1111, in readwriteFaxInformation
    QMessageBox.NoButton) == QMessageBox.Cancel:
TypeError: critical(QWidget, str, str, buttons: Union[QMessageBox.StandardButtons, QMessageBox.StandardButton] = QMessageBox.Ok, defaultButton: QMessageBox.StandardButton = QMessageBox.NoButton): argument 5 has unexpected type 'StandardButtons'

Local variables in innermost frame:
error_text: 'Unable to communicate with the device. Please check the device and try again.'
d: <fax.ledmsoapfax.LEDMSOAPFaxDevice object at 0x7f4190e42a58>
read: True
self: <ui5.setupdialog.SetupDialog object at 0x7f41b1f65f78>

Potential duplicate: bug 1371287