After Synology DSM Update 6.2.3 no longer playing on renderer MF M1 Clic

[Roland]

Hello everyone,
I am asking for help urgently because I can no longer play music with my network player Musical Fidelity M1 Clic from Synology DS218 with MinimServer.

My problem: On May 30th I have updated my NAS DS218 (Synology) on DSM 6.2.3-25426. After that, playing music on my network player (renderer: MF M1 Clic) no longer works.
Access to the MinimServer and play music from the mobile phone or tablet works without any problems.

I get the following error messages from the control point (when trying to play on M1 Clic):
- Mobile phone / iPhone with MConnect lite (UPNP player app): The device sent an error response.
- Tablet / Lenovo P10 with Hi-Fi Cast (UPNP player app): Transistion not available

I would like to rule out a technical problem because I can access the MinimServer and play music via the remote control app: "Box Control" for control my M1 Clic and also from M1 Clic itself.
(That is a possiblity but I want the great comfort of Hi-Fi Cast on my tablet)

However, I absolutely want to get the state as it was before the DSM update.

I am also in contact with Synology Support.
I got the recommendation to uninstall MinimServer and then reinstall it.
Can this really fix my problem?
Does anybody have the same Problem?

Does anyone have any idea what I can do?

Kind regards and thank you in advance.
Roland