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Best answer

Error: "Cannot have two HTML5 backends at the same time."

  • June 26, 2025
  • 3 replies
  • 56 views
S

Hi, 

 

I'm trying to set up multiple Gmail steps for my automated email sequence, but I ran into this error: "Cannot have two HTML5 backends at the same time."

All of my email bodies are in HTML format, and I'm only using a single <div> in each. The other HTML emails work fine — it's just one of them that's triggering this error.

Has anyone else encountered this before or know what might be causing it?

 

 

 

Best answer by Troy Tessalone

Hi ​@SBRetreat 
Feedback to try...

 

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

3 replies

Troy Tessalone
Zapier Orchestrator & Solution Partner
Forum|alt.badge.img+14
  • Troy TessaloneZapier Orchestrator & Solution Partner
  • Zapier Orchestrator & Solution Partner
  • 34070 replies
  • Answer
  • June 26, 2025

Hi ​@SBRetreat 
Feedback to try...

 

⚡ Troy Tessalone - AutomationAce.com | Platinum Authorized Zapier Solution Partner | #1 Zapier Community Contributor
S
  • SBRetreatBeginner
  • Author
  • Beginner
  • 1 reply
  • July 1, 2025

Hi Troy,

 

Thanks for the steps you provided. Doing refresh of the page works amazing :) 

JammerS
Forum|alt.badge.img+6
  • JammerSZapier Staff
  • Zapier Staff
  • 3527 replies
  • July 2, 2025

Wow! Thank you for confirming that Troy’s resolution got the Zap running. This will significantly help our Community members to have as a reference for the same issue.

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