PPF action not triggered automatically

Hello EWM experts,

I have an issue with PPF action in the current system.

Every time the action is created, e.g. print WO, send ERP message, it is always in yellow status.

I have to manually process the action.

At first, I thought it was because of RFC connection because there is an RFC connection issue in SMQS monitor.

But now the even the action to print WO also has the same issue. I have to manually print the WO in monitor. So I think it's not because of the RFC connection.

This is the first time I encounter this issue.

Could anyone suggest how to solve this?