AP Invoice Approval Rules not getting loaded through spreadsheet, even though ESS Job is succeeded

We are attempting to load AP Invoice Approval Rules from "Manage Workflow Rules in Spreadsheet" task. We are using the latest spreadsheet downloaded from the same instance. When we create rules within the spreadsheet and upload it, the scheduled processes shows the ESS Job "Create Workflow Rules" as succeeded.

However, the rules are not getting loaded. We have verified by running the "Workflow Rules Report" for Invoice Approval and do not see the rules in the report. Moreover, the upload is getting stuck in "In Process" status at the "Manage Workflow Rules in Spreadsheet" task.

Note that we have ensured the BPM task FinApInvoiceApproval is NOT in edit mode when we try to upload the spreadsheet.