In the admin panel after updating to Joomla 3.9.22 and PHP 7.3:

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Warning: require_once(/home/iirp5/public_dev/administrator/includes/toolbar.php): failed to open stream: No such file or directory in /home/iirp5/public_dev/administrator/components/com_jce/controller.php on line 134

Fatal error: require_once(): Failed opening required '/home/iirp5/public_dev/administrator/includes/toolbar.php' (include_path='/home/iirp5/public_dev/plugins/system/shlib/shl_packages//ZendFramework-1.11.7-minimal/library:.:/opt/cpanel/ea-php72/root/usr/share/pear') in /home/iirp5/public_dev/administrator/components/com_jce/controller.php on line 134

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We reached out to the hosting company to check file permissions and PHP configuration, they are telling me the issue is plugin-related.

Any help or insight would be much appreciated.

Thanks!