Traceback (most recent call last):
  File "electrum\bitcoin.py", line 575, 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 403, in start_new_window
  File "electrum\gui\qt\__init__.py", line 483, 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 495, in do_profile
  File "electrum\daemon.py", line 555, in _load_wallet
  File "electrum\wallet_db.py", line 1535, in __init__
  File "electrum\json_db.py", line 296, in __init__
  File "electrum\wallet_db.py", line 1519, in upgrade_wallet_db
  File "electrum\util.py", line 495, in do_profile
  File "electrum\wallet_db.py", line 197, in upgrade
  File "electrum\wallet_db.py", line 488, in _convert_version_20
  File "electrum\bip32.py", line 137, in from_xkey
  File "electrum\bitcoin.py", line 592, in DecodeBase58Check
  File "electrum\bitcoin.py", line 577, in base_decode
electrum.bitcoin.BaseDecodeError: Forbidden character 48 for base 58