This error flags when staff have allowances with a value of 0.
Click into the staff member, and head to their Contracts page.
- Scroll down to Allowances (or Additional Payments) and click into the Allowance/Payment that has a value of £0.00.
- Edit the Allowance to remove it, or correct the 0 'Custom Amount'.
- Make sure the pay factor is not set to 0.