Error on my zap: Halted exception field "Emailblacklisted". Why???!!! Help!

Hi ​@curlz 

For us to have more info, post the DATA IN/OUT for each Zap step from the Zap Run history: https://zapier.com/app/history/

Also, post screenshots showing how your Zap step is configured in EDIT mode with the field mappings visible so we can see the field types.

CONTEXT about the error from AI

Tuesday, July 1, 2025 at 7:49 AM PT

Error Explanation

The error message:

"Halted Exception: Field emailBlacklisted is invalid - it is not Boolean value and can not be converted to Boolean value."

means that the emailBlacklisted field in your Brevo (formerly Sendinblue) step is expecting a Boolean value — either true or false — but something else was passed in (like a string, number, or empty/null value).

Likely Causes:

• You're sending "false" (a string) instead of false (a Boolean).

• You're passing a blank value or a value like "0", "no", or "null" that can't be coerced into a proper Boolean.

• A mapped field from a previous step contains unexpected data.

How to Fix:

1. If using a static value, set:

   "emailBlacklisted": false
   

   (or true if appropriate)

2. If mapping a value from a previous step, use a Code step before to convert the value:

   let raw = inputData.emailBlacklisted;
   let emailBlacklisted = raw === 'true' || raw === true;
   
   return { emailBlacklisted };
   

3. Double-check the input field in your Zap or automation step to ensure it's explicitly set to a Boolean value, not a string.

HI Troy!

Here is one of the contacts that was ‘halted”. There was a second one too.

The DATA IN:

item_id

1

3245330

The DATA OUT:

ID

92924512

Created At

2025-06-17T12:48:15.376Z

User Id

225432149

User Email

usersemailaddress@gmail.com

User Full Name

Gail Txxxx

Product Name

Why Do We Do That.

Amount Dollars

84

Amount Cents

8400

Subscription

false

Coupon Code

Affiliate Referral Code

User First Name

Gail

User Last Name

Txxxxx

Order Number

ORD001144

Product Id

3245330

Items

1

product_name

Why Do We Do That

product_id

3245330

amount_dollars

84

amount_cents

8400

Hi Troy,

could you please clarify how to fix?

Do I do this in Brevo?

Or, Zapier?

Not sure...

​@curlz 

For us to have more info, post screenshots showing how your Brevo Zap step is configured in EDIT mode with the field mappings visible so we can see the field types.

Hi Troy, 

Sure!  

Firstly, I can now see that there have been many ‘halt’ errors!!! I have just noticed this - so, there are many zap tasks that have not gone through.

The screenshots shows just one of them for “Webinar Full Enrol” zap task. (Though this “halt” error also is for “New Leads” and “New Free Report”. )

I hope I’ve supplied the right data you need to troubleshoot this!

Thanks,

Jenny

​@curlz 

From the error message, the issue seems to be related to this field: Email Blacklisted

Click the field label to see a tooltip with more info.

It may be be that the value is being treated as a text string “true”/”false”, instead of a boolean value as true/false.

Or it may be due to capitalization, etc.

That may be a bug with the backend integration.

You can try using the [...] button for the field to switch to “Custom” mode, and set this value: false

You can try opening a ticket with Zapier Support for them to investigate and advise further: https://zapier.com/app/get-help