## TL;DR

Firestore expects typed values, so a plain JSON array is rejected.

## The error

```text
Integromat automation problem - can't store an array in Google Firestore
```

## Fix

1. Firestore expects typed values, so a plain JSON array is rejected.
   Expected: you can confirm this matches your situation.
2. Re-run the original operation and confirm the error is gone.
   Expected: no error, normal output.

## When to use

- You hit this exact error.
- The symptom matches: Integromat automation problem - can't store an array in Google Firestore.

## When NOT to use

- A different error message; the cause here is specific to this error.
- Unrelated issues with a different cause.
- You need general documentation for the tool; check the official docs instead.

## Compatibility

Reported per the linked source.

## Variant phrasings

### Integromat automation problem - can't store an array in Google Firestore

## Why it happens

Stack Overflow question (score 2): syncing data to Google Firestore through Integromat fails when trying to save an array as a field value; every attempted format is rejected.

## Edge cases

- If your error message differs even slightly, this is probably a different issue; search the exact text.
- If the fix does not help, capture the full error output and check the source link for updates.