Sending message error when using Slack integration

I keep seeing this message when im in the jotform app in slack "Sending messages to this app has been turned off." How do I enable this?

Hello Vincent,

Thanks for reaching out to Jotform Support. To clarify, you see the error in the Slack messages? Can you share the form URL of the forms with the issue? I tested a sample form and the Slack integration is working correctly. Check out the screenshot below to see my results:

You can try to re-integrating your form with Slack.

If the issue persists, can you take a screenshot of the error and send it to us? This guide will show you how to do that. Let us know how it goes.