Slack error: Slack workspace has reached a rate limit for this action

Symptoms

When using Slack in your Zaps to send messages, you get the error message “Slack workspace has reached a rate limit for this action”. You’ll see this error in the details of a Zap run in your Zap's history.

Causes

This happens when your Zap triggers too frequently in a short space of time, causing it to exceed Slack’s rate limit of sending 1 chat message per second.

How to fix

To fix this:

1. Replay the Zap run. This will retry the steps in your affected Zap runs.
2. Add a Delay After Queue action before your Slack action. This will allow your actions to be added to a queue and played one at a time, in the order they were added to the queue. 
3. Set up your Delay step time to 1 minute or more.