Description of problem:
When trying to view the "Postal code conversion" dictionnary in the Dictionnary tab of ibus-anthy settings, this error pops up.

Version-Release number of selected component:
ibus-anthy-python-1.5.11-3.fc31

Additional info:
reporter:       libreport-2.11.3
cgroup:         0::/user.slice/user-1000.slice/user/gnome-shell-wayland.service
cmdline:        python3 /usr/share/ibus-anthy/setup/main.py
crash_function: on_btn_dict_view_clicked
exception_type: TypeError
executable:     /usr/share/ibus-anthy/setup/main.py
interpreter:    python3-3.7.5-1.fc31.x86_64
kernel:         5.3.13-300.fc31.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
main.py:1457:on_btn_dict_view_clicked:TypeError: can only concatenate str (not "list") to str

Traceback (most recent call last):
  File "/usr/share/ibus-anthy/setup/main.py", line 1457, in on_btn_dict_view_clicked
    self.__run_message_dialog(_("Your file does not exist: ") + dict_file,
TypeError: can only concatenate str (not "list") to str

Local variables in innermost frame:
self: <__main__.AnthySetup object at 0x7fa20301e910>
widget: <Gtk.Button object at 0x7fa2020c7910 (GtkButton at 0x55948849d340)>
dict_file: ['/usr/share/ibus-anthy/dicts/zipcode.t']
selected_id: 'zipcode'