Timesheet integration requires you to map Sage Payroll to Sage HR. A Payment type has to be linked to at least one Payment category. If a payment category has then been deleted in Sage HR, Sage Payroll needs to be amended to deal with this change.
When processing the pay run, you will see a notification icon on the View timesheet button. This will remain until you edit the payment in Payroll. You must remove the deleted payment category and replace it with a new one if needed.

Clicking the View timesheet button will open the side panel, which will give more details about what has been deleted.

NOTE: This will not retrospectively change any payrolls you have already processed.
You can then click on the Manage payments heading, or browse to: