"body must be object" error with fastify V4

[Tambouil]

Hi,

When using the preHandler hook, I always get a "body must be object" error with fastify V4 :

{
  "statusCode": 400,
  "error": "Bad Request",
  "message": "body must be object"
}

Do you know an easy way to fix this?

[emanuelet]

try this https://stackoverflow.com/questions/72892620/fastify-multipart-form-data-error-body-must-be-object