3421100 - My Inbox app not showing Purchase Order item details

Requirement to release/reject one Purchase Order in the app My Inbox. However, the Purchase Order number appears on the left list but the details aren't displayed on the right side.

SAP S/4HANA Cloud Public Edition

Ensure the approver user has the required catalogs in the assigned role:

• • SAP_MM_BC_PO_MANAGE_PC
  • SAP_MM_BC_PO_WIAPPROVE_PC

Note that having the catalog SAP_MM_BC_PO_WIAPPROVE_PC, the approver can see the Purchase Order to be released or rejected; however for seeing the details the catalog SAP_MM_BC_PO_MANAGE_PC is also necessary to be added. 

SAP_MM_BC_PO_MANAGE_PC, My inbox, S4HC, X4BC, approver, SAP_MM_BC_PO_WIAPPROVE_PC, Purchase Order, S4_1C, S4_PC, reject , KBA , MM-FIO-PUR-PO-WFL , Purchase Order Workflow , MM-PUR-IAM , Identity Management for Procurement , Problem