Adding a comment to a JOBF runid is not possible via AWI or REST API after having upgraded the AE to 12.3.9
The error displayed in AWI is the following:
In the JCP, we can find the related errors:
U00045014 Exception 'java.lang.NullPointerException: "null"' at 'java.util.Objects.requireNonNull():203'.
U00045099 The server replied with following status: '500'
Release : 12.3.9 only
Component : AUTOMATION ENGINE
Defect introduced on AE 12.3.9
Update to a fix version listed below or a newer version if available.
Component(s): Automation Engine
Automation.Engine 12.3.9 HF1 - Available
Adding a comment to an active JOBF leads to an Exception - A bug has been fixed where the check for permissions on executions did not work properly.