Occurs multiple times per second in PHP log.
[Mon Aug 21 14:57:45.159024 2023] [php:warn] [pid 70776] [client 172.58.123.197:1792] PHP Warning: Trying to access array offset on value of type null in /var/www/itflow.mydomain.com/users.php on line 106, referer: https://itflow.getpeerless.com/clients.php
[Mon Aug 21 14:57:45.159028 2023] [php:warn] [pid 70776] [client 172.58.123.197:1792] PHP Warning: Trying to access array offset on value of type null in /var/www/itflow.mydomain.com/users.php on line 107, referer: https://itflow.getpeerless.com/clients.php