3024615 - Supplier Invoice: Flexible Workflow not triggered.

When creating a new Workflow process for either "Blocked" or "Saved as Completed" invoices, it is noticed that the workflow is not triggered when meeting the criteria.
If transaction /n/IWFND/ERROR_LOG is checked in the system, there will be an error "not found" with the S_INVOICEWORKFLOWVH_CDS view.

In addition, it is possible that, if a user is selected as recipient, error "APPL_MM_IV_WORKFLOW 007 - User XXXX is not authorized. Please enter a valid user as approver" or message "user is not valid" is raised, even though the user seems to be maintained in the system. F4 Help (people picker) does not work and, if F12 is used for the Chrome Debugger, you can see the same CDS failing (S_InvoiceWorkFlowRecipientVHType).

Requirement: Badi determination by MRM_WORKFLOW_AGENTS is NOT active.

•  SAP Fiori 
•  SAP S/4HANA All versions 

FIORI, workflow, user maintenance, employee, sync, synchronization, CSI. , KBA , MM-FIO-IV , Fiori UI for Invoice Verification , Problem