I recently tried to move my Drupal site to a new server using this page: Moving Drupal 7 site to a new server.
But now the style doesn't seem be loaded and more importantly I get this error on every page in the site (even on the frontpage):
Warning: file_put_contents(temporary://filef76T9k): failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 1900 of /Library/Server/Web/Data/Sites/Default/drupal/includes/file.inc).
The file could not be created.
Any ideas what this could be about?