Error messages in (Beta) Keba wallbox integration in HACS

I am using the latest version of the (beta) Keba wallbox integration from HACS and Home Assistant 2024.1.6.
I need different RFID cards to authorize charging and based on the documentation the build-in integration Keba Wallbox can only support one RFID card.
I get the following error, when I use the keba.start service call with an RFID:

Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/websocket_api/", line 238, in handle_call_service
response = await
File "/usr/src/homeassistant/homeassistant/", line 2149, in async_call
response_data = await coro
File "/usr/src/homeassistant/homeassistant/", line 2186, in _execute_service
return await target(service_call)
File "/config/custom_components/keba/", line 108, in execute_service
host =[CONF_HOST]
KeyError: 'host'
2024-03-26 00:13:05.925 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection] [140543036198336] 'host'

I can still start the charging with the physical RFID cards on the wallbox (KEBA P30-X).
After some restarts of Home Assistant and the wallbox the error disappears.
I opened a ticket in the repository → Link
Any idea how to solve it?