File "electrum\gui\qt\qrcodewidget.py", line 62, in paintEvent
  File "site-packages\qrcode\main.py", line 428, in get_matrix
  File "site-packages\qrcode\main.py", line 93, in make
  File "site-packages\qrcode\main.py", line 150, in best_fit
  File "site-packages\qrcode\main.py", line 17, in _check_version