SAP issue - _PSU_1/PSU_2 not working in CCC

[Legacy note] This SAP version is not supported anymore, if you have this issue, please upgrade the SAP/B1UP installation.

We have identified an issue where the _PSU_1/PSU_2 support users does not work with B1UP.

If you try to start B1UP you will get the error:

The issue is that the DI-API gives the error: “10000004 – B1 License Error L_NO_SESSION”.
This error originates from the DI-API and prevents B1UP from connecting to the DI-API.

Workaround:

There is no workaround at this time. We are unable to connect to the DI-API and as a result, B1UP cannot run.

Fix:

SAP intended to fix the issue in SAP Business One Client version 9.2 PL09 running with CCC PL08 or higher.

*** Update 2019

PSU users broke again afterward, the problem is described in this SAP Note: https://launchpad.support.sap.com/#/notes/2674581

It seems to be fixed (again) in SAP 9.3 PL06.