How to enable loopback connections for WordPress cron in Plesk?



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    Wyk Parish

    I'm using Plesk Obsidian / Ubuntu 18.04 on Amazon Lightsail.  I was getting Loopback and Rest API warning message in WP's Site Health status.  Adding the domains to the local host in Option 1 here did not fix the two warning messages in my situation.  The only way I was able to resolve it via hosts file was to add my Lightsail VPS's static external ip address to the list. 

    sudo nano /etc/hosts

    add line:


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