The steps
1.Query your db as this query.
select id, create_date, store_fname, datas_fname from ir_attachment where datas_fname like ‘%.js%‘;
2.Delete records that you found like "web.assets_common.js" "web.assets_backend.js"
3.Done.

原文：https://github.com/odoo/odoo/issues/9201

odoo jQuery is not defined