Fails to connect, pychromecast 4.2 installed

[ricosaurus]

Fails to connect and hangs.
Install of pychromecast==4.2 has not resolved. this is my first time using mkchromecast so never had it working on earlier Ubuntu. This is Ubuntu 20.04.2.

USER@mycomputer:~$ mkchromecast --select
Mkchromecast v0.3.8.1
Creating Pulseaudio Sink...
Open Pavucontrol and Select the Mkchromecast Sink.
Starting Local Streaming Server
[Done]
Selected backend: parec
Selected audio codec: mp3
Default bitrate used: 192k
Default sample rate used: 44100Hz.
PID of main process: 4004
PID of streaming process: 4081

Serving Flask app "mkchromecast.audio" (lazy loading)
Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
Debug mode: off
Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)

List of Devices Available in Network:

Index Types Friendly Name
===== ===== =============
0 Gcast Kitchen speaker
1 Gcast Upstairs Bedroom display
2 Gcast Upstairs Bedroom speaker
3 Gcast Dining Room speaker
4 Gcast Bedroom speaker

Please, select the Index of the Google Cast device that you want to use:
2

Casting to: Upstairs Bedroom speaker

[record[a,in-unique,602080ac-3141-3f34-fd3c-4fabfbbdc692.local.]=120/119,192.168.0.71:8009] Failed to connect, retrying in 5.0s

[adamjalkemo]

This worked for me:
#334 (comment)