Slack Integration can't see private channels

  • Goal: Connect ReTool via Slack integration (as a resource) and automatically post notifications to a private channel using a resource query workflow block.

  • Steps: Tried to set up Slack resource, configured resource query block with slack resource to run /chat.postmessage, workflow block cannot find the private channel I added ReTool to. Looked at slack permissions scopes docs, double checked resource oauth scopes in resource config.

  • Details: Cloud hosted. According to slack docs, it should only need channels:read and groups:read to find the private channel.

  • Screenshots:
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    No matter what I do I can't seem to get the "Channel" dropdown to list the private channel I'm looking for.