Quick checklist to avoid “JSON syntax is not correct”
| Error | Symptom | Fix |
|---|---|---|
| Trailing comma | Invalid JSON, nothing is displayed | Remove the comma after the last property |
| Values in quotes | Boolean/number values are ignored | Remove quotes around true, false, and numbers |
| Non‑existent ID | Field does not appear | Check the Structure sheet to find the correct ID |
Quick reminder:
-
Always start with an opening brace
{and finish with a closing brace}. -
No unexpected characters (
|,;, etc.). -
Put a comma after every property except the last one.
-
Booleans are written
trueorfalse(without quotes).
Apply these rules, click Save – the button turns blue 👍