How to fully purge uninstalled Addon (HASS Agent)

I uninstalled HASS Agent from my installation through HACS, the same way I installed it. I made sure that no entities were hidden, or disabled.
Yet regardless, my logs are constantly being filled with “homeassistant.loader.IntegrationNotFound: Integration ‘hass_agent’ not found.” errors every time I open my integrations.
From what I’ve found, this is caused by some remnants of uninstalled addons still remaining, usually disabled or hidden integrations, which I checked for.

How can I fully remove whatever is left, and stop these errors once and for all?

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Did you try to restart HA?

I have the same problem. Did you find any help?

Have the same problem, tried a lot of maneuvers incl. reinstall/uninstall going through all editable config files with no avail.

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/decorators.py", line 28, in _handle_async_response
    await func(hass, connection, msg)
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 652, in handle_manifest_list
    raise int_or_exc
homeassistant.loader.IntegrationNotFound: Integration 'hass_agent' not found.

Seems like its Browser/PC Client caused.

[https://www.reddit.com/r/homeassistant/comments/1l4vgks/hass_agent_causing_errors_after_removal/](https://Reddit: hass_agent_causing_errors_after_removal)

Tried using a different browser to access HA, no errors in log with hass_agent as a result, so it seems like the painful way of complete reinstall incl. PC client, and then uninstall in some order.