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"Authentication Template Failure: Authentication Data not found for auth_id" error in Hubspot custom action

  • December 2, 2025
  • 2 replies
  • 13 views

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I’m running into an interesting problem. When my zap is published and turn on, I get this error on my custom action step:

However, in all my test runs this step performs fine. When I try to look up this error code it says the lookup step may be wrong, and that it’s not passing the contact ID correctly to this step, but that doesn’t look like it’s the case. Any ideas why this might be happening?

2 replies

Troy Tessalone
Zapier Orchestrator & Solution Partner
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  • Zapier Orchestrator & Solution Partner
  • December 2, 2025

Hi ​@Maddie Webb 

Try opening a ticket with Zapier Support: https://zapier.com/app/get-help


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  • Author
  • Beginner
  • December 2, 2025

Thanks! I will do that