I've created my custom localization module which basically has the chart of accounts and taxes. But when I upload my module to Odoo.sh the automated test throw the following error:

ERROR: setUpClass (odoo.addons.account.tests.test_account_invoice_report.TestAccountInvoiceReport) Traceback (most recent call last): File "/home/odoo/src/odoo/addons/account/tests/test_account_invoice_report.py", line 15, in setUpClass super(TestAccountInvoiceReport, cls).setUpClass() File "/home/odoo/src/odoo/addons/account/tests/invoice_test_common.py", line 25, in setUpClass cls.tax_armageddon = cls.setup_armageddon_tax('complex_tax', cls.company_data) File "/home/odoo/src/odoo/addons/account/tests/account_test_savepoint.py", line 188, in setup_armageddon_tax 'cash_basis_transition_account_id': company_data['default_account_tax_sale'].copy().id, File "/home/odoo/src/odoo/addons/account/models/account.py", line 477, in copy default['code'] = (str(int(self.code) + 10) or '').zfill(len(self.code)) TypeError: object of type 'bool' has no len()
Why does this error appear, and how can I fix it? It only appears because of the automated tests, in my local server there are no errors at all