core: Denon AVR is not being detected by the config flow

The problem

My Denon AVR is not being detected by the config flow (also not with manual IP) I can’t use my Denon anymore. Has worked for years before 😦

Environment

• Home Assistant Core release with the issue: 112.2
• Last working Home Assistant Core release (if known): 111.4
• Operating environment (OS/Container/Supervised/Core): 4.11
• Integration causing this issue: Denon AVR
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/denonavr/

Problem-relevant configuration.yaml

THE PREVIOUS configuration.yaml SETTING I USED BEFORE. IT’S NOW REMOVED. media_player:

• platform: denonavr host: 192.168.66.9 name: Denon DN-500AV show_all_sources: false timeout: 2

Traceback/Error logs

If I don't enter a IP in the config flow it says: Failed to discover a Denon AVR Network Receiver

And if I do enter a manual IP adres it says: Failed to connect, please try again
and registers in the log these two:

2020-07-05 11:18:35 WARNING (ThreadPoolExecutor-11_1) [DenonAVR] Receiver name could not be determined. Using standard name: Denon AVR.

2020-07-05 11:18:35 ERROR (MainThread) [homeassistant.components.denonavr.receiver] Missing receiver information: manufacturer 'None', name 'Denon AVR', model 'None', type 'avr'

Additional information

But if I press the big plus sign. Lookup Denon, enter your IP/hostname.

192.168.66.9

I get: Failed to connect, please try again. And it has been working for years before updating to 112.2