HA won't start after configuring ZHA


I added USB Zigbee dongle and configured ZHA:
> zha:

  usb_path: /dev/ttyAMA0
  database_path:  /home/homeassistant/.homeassistant/zigbee.db

And HA won’t load. The log file does not show anything special other than " Setup of zha is taking over 10 seconds".

How did you fix your issue?

I wish I knew. It got resolved on its own after some reboots.