Invalid Response about dropbox-php-sdk HOT 4 CLOSED

    protected function decodeBody()
    {
        $body = $this->getBody();

        if (isset($this->headers['Content-Type']) && in_array('application/json', $this->headers['Content-Type'])) {
            $this->decodedBody = json_decode((string)$body, true);
        } else {
            $this->decodedBody = $this->body;
        }

        // If the response needs to be validated
        if ($this->getRequest()->validateResponse()) {
            //Validate Response
            $this->validateResponse();
        }
    }

        if($this->decodedBody=== null && $body!='')
            $this->decodedBody = array('file'=>$body);