WordPress useEntityProp returns undefined

I have created a custom block use the blocks API. I am using useEntityProp to get/set post meta. This works fine on my dev server but on the live server useEntityProp is returning undefined.

Here is my edit file (console.log(meta) returns undefined) :

import { __ } from "@wordpress/i18n";
import { MediaUpload, useBlockProps } from "@wordpress/block-editor";
import { useEntityProp } from "@wordpress/core-data";
import { Button } from "@wordpress/components";

const Edit = (props) => {
  let {
    attributes: { foundFeatures, features, gallery, itinerary, duration },
    setAttributes,
    context: { postType, postId },
  } = props;

  let [meta, updateMeta] = useEntityProp("postType", postType, "meta", postId);

The context is returning the correct post type and post id.

And I am registering the post meta enabling the show_in_rest option

    register_post_meta(
        'tour-collection',
        'locations',
        array(
            'show_in_rest'       => true,
            'single'             => true,
            'type'               => 'string',
        )
    );

You need to add custom-fields to the supports argument when creating the post type.