3212473 - Error 'There are still working times not yet submitted or awaiting approval' when closing a Customer/Enterprise Project

When trying to close a Customer/Enterprise Project, the error 'There are still working times not yet submitted or awaiting approval' is being raised.

SAP S/4HANA Cloud Public Edition

S/4HANA Cloud, timesheet, time, entries, open, in process, cancelled, project, customer, close, error, pending, Plan Customer Projects, Project Control, Enterprise Project, WBS Element, there are still working times not yet submitted or awaiting approval, i_timesheetrecord , KBA , CA-TS-S4 , Cross Application Timesheet in S/4HANA , CA-CPD-SS , S/4HANA Public Cloud – Professional Service Projects , PPM-SCL-STR-FIO , Fiori UI for Project Structure (Public Cloud) , How To