INTERNAL SERVER ERROR

[cftjim0130]

Hi everyone.
I am trying to use beancount. After creating the file, when I click on Holdings, INTERNAL SERVER ERROR appears.
My environment is as follows:
Python 3.9.6
beancount 3.1.0
fava 1.30

test.bean:

option "operating_currency" "USD"
1970-01-01 open Assets:BANK
2014-01-01 open Equity:Opening-Balances

2014-01-02 * "Deposit"
Assets:BANK 100.00 USD
Equity:Opening-Balances

Exception on /beancount/api/query [GET]
Traceback (most recent call last):
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/flask/app.py", line 1511, in wsgi_app
response = self.full_dispatch_request()
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/flask/app.py", line 919, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/flask/app.py", line 917, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/flask/app.py", line 902, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return]
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/fava/json_api.py", line 259, in _wrapper
res = func(*validator(data))
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/fava/json_api.py", line 286, in get_query
return g.ledger.query_shell.execute_query_serialised(
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/fava/core/query_shell.py", line 185, in execute_query_serialised
res = self.shell.run(entries, query)
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/fava/core/query_shell.py", line 94, in run
self.context = connect(
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/beanquery/init.py", line 26, in connect
return Connection(dsn, **kwargs)
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/beanquery/init.py", line 35, in init
self.attach(dsn, **kwargs)
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/beanquery/init.py", line 39, in attach
source = importlib.import_module(f'beanquery.sources.{scheme}')
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/importlib/init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1030, in _gcd_import
File "", line 1007, in _find_and_load
File "", line 986, in _find_and_load_unlocked
File "", line 680, in _load_unlocked
File "", line 850, in exec_module
File "", line 228, in _call_with_frames_removed
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/beanquery/sources/beancount.py", line 91, in
class Transaction(types.Structure):
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/beanquery/sources/beancount.py", line 93, in Transaction
columns = _typed_namedtuple_to_columns(data.Transaction)
File "/Users/name/MySoft/beancount/lib/python3.9/site-packages/beanquery/sources/beancount.py", line 54, in _typed_namedtuple_to_columns
for name, dtype in typing.get_type_hints(cls).items():
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/typing.py", line 1424, in get_type_hints
value = _eval_type(value, base_globals, localns)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/typing.py", line 290, in _eval_type
return t._evaluate(globalns, localns, recursive_guard)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/typing.py", line 546, in _evaluate
eval(self.forward_code, globalns, localns),
File "", line 1, in
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'