We are having big trouble with WebDirect after FMS20.3.2 upgrade, but we are not using PSoS with Callbacks at all.
Our symptom is mainly multiple random disconnections. Event.log shows this:
2024-02-27 15:10:31.192 -0800 Warning 30 example.com Client "[WebDirect-38B00] (x.x.32.1) [x.x.32.1]" no longer responding; connection closed. (10)
Update: our problem seems different than the OPs, so I started a new thread: FMS 20.3.2 WebDirect and External Data Source not found