Odoo Server Error
Traceback (most recent call last):
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 677, in dispatch
    result = self._call_function(**self.params)
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 353, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/Users/alain/odoo-server/odoo/odoo/service/model.py", line 93, in wrapper
    return f(dbname, *args, **kwargs)
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 346, in checked_call
    result = self.endpoint(*a, **kw)
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 923, in __call__
    return self.method(*args, **kw)
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 523, in response_wrap
    response = f(*args, **kw)
  File "/Users/alain/odoo-server/odoo/addons/web/controllers/main.py", line 1318, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/Users/alain/odoo-server/odoo/addons/web/controllers/main.py", line 1310, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/Users/alain/odoo-server/odoo/odoo/api.py", line 394, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/Users/alain/odoo-server/odoo/odoo/api.py", line 381, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/Users/alain/odoo-server/enterprise-dev/account_reports/models/account_report.py", line 1159, in get_html
    lines = self._get_lines(options, line_id=line_id)
  File "/Users/alain/odoo-server/enterprise-dev/account_reports/models/account_general_ledger.py", line 66, in _get_lines
    return self._get_general_ledger_lines(options, line_id=line_id)
  File "/Users/alain/odoo-server/enterprise-dev/account_reports/models/account_general_ledger.py", line 136, in _get_general_ledger_lines
    lines.append(self._get_aml_line(options, account, aml, company_currency.round(cumulated_balance)))
  File "/Users/alain/odoo-server/enterprise-dev/account_reports/models/account_general_ledger.py", line 758, in _get_aml_line
    columns.insert(3, {'name': self.format_value(aml['amount_currency'], currency=currency, blank_if_zero=True), 'class': 'number'})
  File "/Users/alain/odoo-server/enterprise-dev/account_reports/models/account_report.py", line 1276, in format_value
    if currency_id.is_zero(amount):
  File "/Users/alain/odoo-server/odoo/odoo/addons/base/models/res_currency.py", line 170, in is_zero
    return tools.float_is_zero(amount, precision_rounding=self.rounding)
  File "/Users/alain/odoo-server/odoo/odoo/tools/float_utils.py", line 125, in float_is_zero
    return abs(float_round(value, precision_rounding=epsilon)) < epsilon
  File "/Users/alain/odoo-server/odoo/odoo/tools/float_utils.py", line 72, in float_round
    normalized_value = value / rounding_factor # normalize
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 632, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/Users/alain/odoo-server/odoo/odoo/http.py", line 317, in _handle_exception
    raise exception.with_traceback(None) from new_cause
TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'