Entities are no longer available !

[Veaullus]

Dear all,

Since January 11, several entities are no longer available:

• sensor.stiebel_eltron_isg_target_temperature_water
• sensor.stiebel_eltron_isg_outdoor_temperature
• sensor.stiebel_eltron_isg_actual_room_temperature_hk_1
• sensor.stiebel_eltron_isg_actual_temperature_water
  ...to name only the one that I already used almost daily, but there are others.

In my opinion, this is not a hardware or data availability problem, because it is available and correct via the platform SERVICEWELT.
Of course I restarted everything, whether it was my RPI (which hosts HA), the ISG module, or even the heat pump.
But nothing comes back.
I don't see a similar message here, so I assume I'm the only one experiencing the problem. I don't know if this is good news.

Do you have an idea ?

Thank you in advance, and have a good weekend ;-)