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Question

Troubleshooting MailChimp 'Invalid Resource' error when subscribing users from Zoom

  • Trigger: User registers for a webinar on Zoom
  • Action 1: Subscribe user to List #1 on MailChimp
  • Action 2: Subscribe user to List #2 on MailChimp

Most of the zap runs have worked fine. But for one zap run, we got this error message on Action 2: 

“Mailchimp ran into an error: Invalid Resource - The resource submitted could not be validated. For field-specific details, see the 'errors' array. ip_signup: This value is not a valid IP. Valid IPs have a format of W.X.Y.Z where each letter represents a...”

The outgoing data doesn’t include any IP information. Also, MailChimp was accepted Action 1. Any idea what could be going on?

 

This post has been closed for comments. Please create a new post if you need help or have a question about this topic.

2 replies

Troy Tessalone
Zapier Orchestrator & Solution Partner
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  • Troy TessaloneZapier Orchestrator & Solution Partner
  • Zapier Orchestrator & Solution Partner
  • August 28, 2026

Hi ​@postcarbon 

First clarify which exact Mailchimp action is being used for Zap step 2.

Official options: https://zapier.com/apps/mailchimp/integrations#triggers-and-actions

 

For us to have more context about the error, post screenshots showing:

  • how the Zap step is configured in the CONFIGURE tab while in EDIT mode with the field mappings visible
  • the DATA IN for Zap step 2 in the Zap Run that had the error

 

In the Zap Run with the error, check the LOGS tab in Zap step 2 to see the underlying API request/response for the raw data used.

Help: https://help.zapier.com/hc/en-us/articles/8496037690637-How-to-troubleshoot-errors-in-Zap-workflows#h_01JW91XS6DDP0MMMHYCWKTBSWT

⚡ Troy Tessalone - AutomationAce.com | Top Zapier Solution Partner | #1 Zapier Community Contributor
SamB
Community Manager
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  • SamBCommunity Manager
  • Community Manager
  • August 28, 2026

Hi ​@postcarbon 👋

Is the Zap using a Add/Update Subscriber or Add Subscriber to Tag action event for actions 1 and 2, or is it using an API Request action event? Wondering if it might be a API Request one since the other actions don't seem to have any IP address fields to select values for. 🤔

And if you can share a screenshot of the setup for both actions (use a tool like Zappy to remove any personal/sensitive info before sharing here), that'll help us compare the two and see why action 2 might be erroring even though no IP details are being passed through. 

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