File "/usr/lib/python3/dist-packages/electrum/gui/qt/main_window.py", line 2822, in do_import_labels
    import_meta_gui(self, _('labels'), self.wallet.import_labels, on_import)
  File "/usr/lib/python3/dist-packages/electrum/gui/qt/util.py", line 926, in import_meta_gui
    importer(filename)
  File "/usr/lib/python3/dist-packages/electrum/wallet.py", line 446, in import_labels
    for key, value in data.items():