Traceback (most recent call last):
  File "electrum\bitcoin.py", line 592, in base_decode
KeyError: 48

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "electrum\gui\qt\__init__.py", line 407, in start_new_window
  File "electrum\gui\qt\__init__.py", line 479, in _start_wizard_to_select_or_create_wallet
  File "electrum\daemon.py", line 495, in func_wrapper
  File "electrum\daemon.py", line 521, in load_wallet
  File "electrum\util.py", line 498, in do_profile
  File "electrum\daemon.py", line 555, in _load_wallet
  File "electrum\wallet_db.py", line 1579, in __init__
  File "electrum\json_db.py", line 107, in __init__
  File "electrum\wallet_db.py", line 1563, in upgrade_wallet_db
  File "electrum\util.py", line 498, in do_profile
  File "electrum\wallet_db.py", line 211, in upgrade
  File "electrum\wallet_db.py", line 503, in _convert_version_20
  File "electrum\bip32.py", line 137, in from_xkey
  File "electrum\bitcoin.py", line 609, in DecodeBase58Check
  File "electrum\bitcoin.py", line 594, in base_decode
electrum.bitcoin.BaseDecodeError: Forbidden character 48 for base 58