I am trying to do a integration between Slack and WhatsApp through https://www.tyntec.com following this tutorial: https://www.tyntec.com/docs/whatsapp-business-api-integration-slack
I've arrived at the last step where I need to write a Slack command called: "/whatsapp" I get this message in Slack: "Channel is already initiated or WhatsApp used in another channel".
We tried and uninstalled other apps from Slack but see the same error. I've tried 4 different apps and saw the same error.
