Description of problem:
Unexpectily error pop's up without telling wat had happened. 

Version-Release number of selected component:
hplip-3.23.5-1.fc38

Additional info:
reporter:       libreport-2.17.11
kernel:         6.3.12-200.fc38.x86_64
cmdline:        /usr/bin/python3 /usr/bin/hp-setup -b usb
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/app-org.gnome.Terminal.slice/vte-spawn-564e1b46-6dfe-467f-a214-8c5fe1619697.scope
uid:            1000
reason:         setupdialog.py:1065:addPrinter:AttributeError: 'SetupDialog' object has no attribute 'fax_number'
executable:     /usr/bin/hp-setup
type:           Python3
package:        hplip-3.23.5-1.fc38
runlevel:       N 5
exception_type: AttributeError
crash_function: addPrinter
interpreter:    python3-3.11.4-1.fc38.x86_64
comment:        Unexpectily error pop's up without telling wat had happened. 

Truncated backtrace:
setupdialog.py:1065:addPrinter:AttributeError: 'SetupDialog' object has no attribute 'fax_number'

Traceback (most recent call last):
  File "/usr/share/hplip/ui5/setupdialog.py", line 1422, in NextButton_clicked
    self.addPrinter()
  File "/usr/share/hplip/ui5/setupdialog.py", line 1065, in addPrinter
    if self.FaxNumberLineEdit.text() != self.fax_number:
                                        ^^^^^^^^^^^^^^^
AttributeError: 'SetupDialog' object has no attribute 'fax_number'

Local variables in innermost frame:
self: <ui5.setupdialog.SetupDialog object at 0x7f7188d027a0>
print_sts: 0