400 Bad Request: Garblin
400Bad Request
GarblinParse FailWhat nonsense! I can't understand a word.What it means
The request is malformed: syntax, format or invalid data.
Where you meet it
Broken JSON, a missing required field, invalid query parameters, a request body cut off halfway.
What to test
- In Postman (or DevTools), send a request with broken JSON or without a required field → status 400, not 500.
- Send the same broken request and read the error message → it names what exactly is wrong (which field, what format).
- Look at the full error response → no stack trace, file paths or SQL inside.