Perfect. Thanks. This is what I expected to see. So what we will do to prevent this issue/problem from happening is to add another filter to Plugin Firewall AutoPilot Mode for this condition/error log entry. For now you can either click the Security Log Delete Log button to clear your Security Log file or just ignore this issue/problem. This issue/problem is not critical or important and is a nuisance issue/problem. This will be added/done in BPS Pro 10.7. Thanks.
IP address: 91.200.13.64 belongs to a known Ukrainian hacker/spammer group/gang. So this is some sort of probe/recon on the hello.php file.