Getting "Error parsing response. We got: !DOCTYPE html when trying to send a subscriber to Klaviyo

  • 25 March 2021
  • 6 replies

So we’re trying to set up a zap that triggers when someone completes a form on instapage which should send add that person to a subscriber list in Klaviyo. For context, we have two potential forms that can be filled out with different parameters - essentially a ‘true’ or ‘false’ depending on which button you pressed (and subsequently which form you filled in).


When testing to send a sub to Klaviyo, I’m met with the error 

The subscriber could not be sent to Klaviyo.

Error parsing response. We got: "<!DOCTYPE html>


Does anyone know why this is or how to solve?



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6 replies

Userlevel 7
Badge +14

Hi @DerekO 

Can you please provide screenshots of how your Zap steps are currently configured along with the returned error, thanks.

Hey @Troy Tessalone 


Sure, see below:

Trigger config:

Action config:


And the error:


Userlevel 7
Badge +14


Error is likely due to this field, try instead to select a value from the dropdown list rather than mapping a dynamic value.


@Troy Tessalone 

Thank you for this - has fixed the error and successfully sent a sub to Klaviyo. Issue now is that we cannot see the sub in Klaviyo nor can we see anything in the zap history?

Userlevel 7
Badge +14


The Zap says it was successful, but the subscriber wasn't added to the list

If your list is set to use double opt-in in Klaviyo, new subscribers won't be added to the list right away, but will receive a confirmation email.
Once the person confirms that they want to opt-in, they will then appear on the list.

Userlevel 7
Badge +10

Just checking in to see if you still need help with this?