File "electrum\gui\qt\qrcodewidget.py", line 59, in paintEvent
  File "site-packages\qrcode\main.py", line 427, in get_matrix
  File "site-packages\qrcode\main.py", line 92, in make
  File "site-packages\qrcode\main.py", line 149, in best_fit
  File "site-packages\qrcode\main.py", line 17, in _check_version