What is the warning I get after moving to a new server? This is the warning that I've received:

Warning: file_put_contents(temporary://devel_themer/cs6782ec6bb66b8a6ebfd11530a1ce0d9d1ce55eba): failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in devel_themer_store_krumo() (line 348 of /home/u894021300/public_html/sites/all/modules/devel_themer/devel_themer.module).


What is it?
Check for file permission where this module is trying to write , especially the temporary folder: admin/config/media/file-system