Custom Sonos Card not displayed

[boe322]

Used custom card:
https://github.com/johanfrick/custom-sonos-card
Sonos Entitys correctly identified by lovelace adapter

Visual editor and manual editing of the card did not show anything at all:

According to coder of custom sonos card no such issue present in HA, no errors shown in lovelace or IOBroker log

Expected behaviour:
show card as in HA
Host: Raspi Pi4B JS Controller 5.0.12 node: V20.9.0
Admin Adapter 6.12.0
Sonos Adapter 3.0.0
Lovelace Adapter: 3.0.1

[boe322]

Tested again with lovelace Adapter 4.1.2 and Sonos Card 6.15.3 still not showing