Slack error: Slack throttling only allows writing 1 chat message per second

Symptoms

When using Slack in your Zaps to send messages, you get the error message: ("('Slack throttling only allows writing 1 chat message per second.', None)", None) You’ll see this error in the details of a Zap run in your Zap's history.

Causes

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

How to fix

To fix this:

1. Add a Delay After Queue action before your Slack action.  This will queue your actions and play them one by one in order they were added.
2. Set up your Delay step time to 1 minute or more.