PS FSCM - Time Report (Expense Report) could not be approved due to system error

Hello,

We are facing a strange issue in PeopleSoft Finance Time and Expense workflow. We are in 9.1 and tools version is 8.52.

When a user submits or approves a time or expense report in FSCM, the users are notified with the attached email, which says “Time Report (Expense Report) could not be approved due to system error. Please contact the system administrator”

This issue pops up once in a while in production. We are unable to replicate the issue in development environment.

Assuming, that issue could be related to Integration Broker setup. So we checked the gateway, nodes, Service and Service Operation (EX_APPROVAL), handler and routing setup. All the IB setup are active.