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

TL;DR

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

The error

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.

1. 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.