DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() DrupalTemporaryStreamWrapper::stream_open call failed in file_unmanaged_save_data()

I do not identify the problem. Could anyone help me?
You can solve this by setting up temporary path i.e.

Goto :


  Home » Administration » Configuration » Media and fix temporary
  directory.


or Goto to the path &amp; add temp url :

config/media/file-system