Cams work with Echo Show 1. Gen, Echo Spot but not with Echo Show 8

[olaf.zilles]

Hi!
I have 6 hikvision cams connected with your skill to my Echo’s. It works perfectly with my Echo Show 1. Gen and with my Echo Spots. So settings seem to be right. But on my Echo Show 8 it always says “Cam does not react” (in German it says “Kamera reagiert nicht”, so I do not know if the translation is correct).

What is the error?

Thanks!
Olaf