When trying to create a payslip, i get the following error
Odoo Server Error - Validation Error
The operation cannot be completed:- Create/update: a mandatory field is not set.
- Delete: another model requires the record being deleted. If possible, archive it instead.
Model: Pay Slip (hr.payslip), Field: Unknown (Unknown)
Normally such messages are displayed when a value for the required is not given during create/update. So you have to cross check and understand which fields i causing the problem or any custom modules are making the problem.
see: https://www.youtube.com/watch?v=080u70vv7sk