For cloud alerts vs. slack on failure sensor in the case of Slack which one requires the

#

to be part of the channel. I am confused. It looks like the sensor needs it but the alert not. Currently I do receive alerts in slack. But:

Slack alert failed to send.
slack_sdk.errors.SlackApiError: The request to the Slack API failed. (url: <https://www.slack.com/api/chat.postMessage>)
The server responded with: {'ok': False, 'error': 'channel_not_found'}

albeit this error, one of both is sending the alerts. I think the oss slack sensor is working - but the cloud alert is failing. How can I configure the cloud alert correctly? Do I need to include the

#

in the slack channel key there? However, the documentation is indicating that this is not required.

Most often when I see this error, it's because the Dagster Cloud bot hasn't been added to the relevant slack channel - any chance that's what's happening here?

it is telling me it is connected.