Yamaha MusicCast - Error utf-8 codec, invalid start byte

Configuration
1

Hi,
just updated to HA 2021.8.8 some days ago. The new integration for my Yamaha device was running after some adjustment made (first time using the integration instead of yaml). Two days everything was OK, then suddenly the device was no longer available in HA. I resetet, restartet and even delete the device once, no success.
Alwas see following error in the integration: ‘utf-8’ codec can’t decode byte 0xff in position 503: invalid start byte

Any help on this???
Thank you!

2

Good day- just wonder if anybody could help here. I tried even istalling an older version/back-up no success. Thank you for any help on thsi.

JJ