External Email Tracking Points

Your software
My Mautic version is: 4.4.6
My PHP version is: 7.4.33
My Database type and version is: mysqlnd 7.4.33

Your problem
My problem is: I am sending out external emails and trying to track the points when the customer opens the email. It shows the email was sent externally but it does not track the points when the external customer opens the email. Is there a setting in the configuration that will allow the tracking of points for external customers?

These errors are showing in the log:

Steps I have tried to fix the problem:

Hello, what is an external customer? Someone who is not registered in mautic as contact?

Actually I’m describing in this article how can it be done: