400 Bad Request: rest_invalid_param

[cweiske]

When selecting an emoji, a HTTP request is sent to the wordpress instance (/wp-json/wp/v2/react). It fails:

{"code":"rest_invalid_param","message":"Ung\u00fcltige(r) Parameter: emoji","data":{"status":400,"params":{"emoji":"emoji ist nicht vom Typ string."}}}

("emoji is not of type string")

That's with Wordpress 4.7.3 and WP REST API 2.0-beta15