R12.1.3 - AP Invoice approval workflow issue

Dear All,

We are facing the issue in AP Invoice approval workflow.

Invoice has been booked and sent for approval. When an approver approves the invoice, it is not moving next approver.

When I checked in AME_EXCEPTIONS_LOG table, getting "2018:10:25:14:39:40The approver passed to ame_api2.updateApprovalStatus does not match anyone on the list of approvers." message then Invoice Approval status changed to "Workflow Approved" even first approver does not have approval limit.

First approver and next approver both have active accounts in HRMS and FND_USER table.

Please help me find route cause of this issue.

Regards,

Anjana