Error:
Uncaught TypeError: Cannot convert undefined or null to object

http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1627-c361928/1/survey.survey_assets.js:968
Traceback:
TypeError: Cannot convert undefined or null to object
    at Function.keys (<anonymous>)
    at Class._getInactiveConditionalQuestionIds (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1627-c361928/1/survey.survey_assets.js:968:1025)
    at Class._validateForm (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1627-c361928/1/survey.survey_assets.js:955:555)
    at Class._submitForm (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1627-c361928/1/survey.survey_assets.js:945:185)
    at Class._onSubmit (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1627-c361928/1/survey.survey_assets.js:940:6)
    at HTMLButtonElement.<anonymous> (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1608-1b4ba6d/1/web.assets_common_lazy.js:4533:11)
    at HTMLDivElement.dispatch (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1608-1b4ba6d/1/web.assets_common_lazy.js:1581:447)
    at HTMLDivElement.elemData.handle (http://1557231-44950-5c03db.runbot13.odoo.com/web/content/1608-1b4ba6d/1/web.assets_common_lazy.js:1567:166)