You have pressed Fix it button but you are still getting below warning notification while configuring the WordPress SEO by Yoast.
Your theme contains a meta description, which blocks WordPress SEO from working properly, please delete the following line, or press fix it:
1. Login to your WordPress Dashboard. Go to Appearance > Editor. Click on header.php. Look for meta name line of your description and delete it. Then, save the file to update it.
2. Go back to the Yoast SEO plugin dashboard, click on Fix it and Save Settings. The warning notification will disappears now.