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Zapier: Required field "..." is missing

ConfigurationErrors from connected apps

Last verified

The exact message
Required field "Subscriber Email" (email) is missing

What it means

Zapier raises this before calling the app when a field marked as required in the action has no value for this run. The message names the field's label and, in parentheses, its internal key, for example Required field "Email" (email) is missing. Zapier has app-specific help articles for common cases such as Mailchimp's Subscriber Email and ChatGPT's User Message.

The field is usually filled in the editor, but with a mapped value from an earlier step. In this run, that value was empty: the trigger record did not have it, a search returned nothing, or a field name changed upstream. Community moderators point out that when the Data In panel shows the raw {{variable}} placeholder, the mapped variable was missing or invalid for that run.

What is not wrong: the app connection and the Zap structure.

What it looks like

Data In
  email: {{123456__email}}     <- placeholder shown means the value was missing
Required field "Email" (email) is missing

Why it happens

  • The trigger record has an empty value for the mapped field.
  • An earlier search step halted or returned no record, so the mapping is blank.
  • The source app renamed or removed the field, breaking the mapping.
  • Stale test data or an optional setting (such as QuickBooks "Make Recurring?") made more fields required.

How to fix it

  1. Open the failed run and look at Data In for the step; find the empty field.
  2. Check the trigger data for that run to see whether the source value existed.
  3. Remap the field in the editor and use Refresh fields if the app's fields changed.
  4. Add a Filter before the step so runs without the value stop cleanly, or supply a default with Formatter.
  5. Retest the step and replay the failed runs.

How to stop it recurring

Validate required data at the start of the Zap with a Filter, provide defaults for optional sources, and avoid mapping from steps that can halt without a result.

Official documentation: help.zapier.com/hc/en-us/articles/27670089986701-ChatGPT-OpenAI-error-Required-field-User-Message-user-message-is-missing. See all Zapier error messages or the Zapier limits and quotas.

Related errors

Definitions

Quick answers

What does "Required field "..." is missing" mean in Zapier?

Zapier raises this before calling the app when a field marked as required in the action has no value for this run. The message names the field's label and, in parentheses, its internal key, for example Required field "Email" (email) is missing . Zapier has app-specific help articles for common cases such as Mailchimp's Subscriber Email and ChatGPT's User Message.

How do I fix "Required field "..." is missing"?

1. Open the failed run and look at Data In for the step; find the empty field. 2. Check the trigger data for that run to see whether the source value existed. 3. Remap the field in the editor and use Refresh fields if the app's fields changed. 4. Add a Filter before the step so runs without the value stop cleanly, or supply a default with Formatter. 5. Retest the step and replay the failed runs.

Error handling you can see in the workflow

Autonoly workflows have per-node retries, timeouts, continue-on-fail and error-handler branches, so a failing step can be retried or routed instead of stopping the whole run. Saved workflows have no loop node; lists are worked through by the AI agent or one run per trigger item.

Also see Visual workflow builder.