Quick Plesk config question...

Been getting open_basedir() notices in the WordPress logs, and frankly it's flooding the log right now. Sample below:

[24-Feb-2019 07:05:19 UTC] PHP Warning: file_exists(): open_basedir restriction in effect. File(/var/www/vhosts/webspacedomain.com/SiteInstallDirectory/wp-content/db.php) is not within the allowed path(s): (/var/www/vhosts/webspacedomain.com/:/tmp/) in /var/www/vhosts/webspacedomain.com/SiteInstallDirectory/wp-includes/load.php on line 397

Checking the settings for open_basedir in the domain's PHP settings, it's currently set to the following default value:

{WEBSPACEROOT}{/}{:}{TMP}{/}

By my read, that **should** be granting permission to the directory. I just checked it against the setting on the dev server (which doesn't report this error), and it's configured in the same manner. Only difference between Dev environment and this one is that the one in Dev is in vhosts/webspacedomain.net/DEV instead of just vhosts/webspacedomain.net

Is there something I'm missing here?