解释错误：com.volcengine.ark.runtime.exception.arkhttpexception: {"statuscode":400,"code":"missingparameter","param":"messages.content","type":"badrequest","requestid":"20240813053926hqyesbealqukl7qzcg1s","detailmessage":"the request failed because it is missing one or multiple required parameters. request id: 021723541967083984915fd303c2a0eaba2b3f9c55af09f4d177c","cause":{"code":400,"message":"bad request","detailmessage":"http 400 bad request","stacktrace":[{"declaringclass":"com.volcengine.ark.run