When you create a new user, and are using multi-company, then you must set

company_id

and

company_ids

If you look in

odoo\addons\base\models\res_users.py	​

then you can seach for the error message and see Odoo searching for company_id in company_ids so if company_ids is not set when the user is created then this error will be generated.

To create a minimal user, you need to create the following fields:

company_id
company_ids
partner_id
login
groups_id

but don't forget to look up the defaults.

The chosen Branch is not in the allowed Branches for this user getting same error while create user by button

company also same error

Py code

def action_create_user(self):
    for line in self:

        if line.name:
            user = self.env["res.users"].create({"name": line.name,
                                                 "login": line.employee_code, "company_ids": line.company_id,
                                                 "branch_ids": line.branch_id})
            print(user, "user")
            line.user_id = user.id

def action_create_user(self):
    for line in self:

        if line.name:
            user = self.env["res.users"].create({"name": line.name,
                                                 "login": line.employee_code, "company_ids": line.company_id,
                                                 "branch_ids": line.branch_id})
            print(user, "user")
            line.user_id = user.id