This issue is actually from the server-side because the session doesn’t seem to have full permission.
Follow these instructions to fix this warning.
Step 1: Create a new folder with the name “tmp” on your root directory with full permission.
Step 2: Copy the below code and insert before session_start() in redirect.php which you can find under this path – (wp-content\plugins\accelerated-mobile-pages\includes\redirect.php )
ini_set(‘session.save_path’, get_home_path() . ‘/tmp’);
That’s it for this tutorial!
We hope it helped you. If you have any feedback or questions, then please share them in the comments section below.