Laravel 5.4.36中session没有保存成功问题的解决

/
   Save the session data to storage.
  
   @return bool
  /
 public function save()
 {
  $this->ageFlashData();

  $this->handler->write($this->getId(), $this->prepareForStorage(
   serialize($this->attributes)
  ));
  $this->started = false;
 }

/
   {@inheritdoc}
  /
 public function write($sessionId, $data)
 {
  $this->files->put($this->path.'/'.$sessionId, $data, true);

  return true;
 }