2021-06-03 22:23:10 WARNING (SyncWorker_1) [homeassistant.loader] We found a custom integration zha_custom which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2021-06-03 22:23:10 ERROR (SyncWorker_1) [homeassistant.loader] The custom integration 'zha_custom' does not have a valid version key (None) in the manifest file and was blocked from loading. See https://developers.home-assistant.io/blog/2021/01/29/custom-integration-changes#versions for more details
As of version 2021.06