PO's have suddenly stopped auto-generating from Requisitions

Summary:

We have PO's successfully Auto created from Requisitions. This suddenly stopped and I cannot see the Requisition lines or any indication of the Status of Requisition. Requisition are created using Internal catalog and BPA's. I cannot manually create the PO from the approved requisitions.

Is there a background process we can run to complete the PO creation?

Did some server process stop working and needs to be restarted?

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Version (include the version you are using, if applicable):

23C

Code Snippet (add any code snippets that support your topic, if applicable):