In custom app installation I have “The “Strict-Transport-Security” HTTP header is not set to at least “15552000” seconds.” message.

For Apache it should to be set VirtualHost file as:

<VirtualHost *:443>

Header always set Strict-Transport-Security “max-age=15552000; includeSubDomains; preload”

Where and what exactly to add in CyberPanel?

You fix it?

Wrote a small guide on how to do this →

This is just wonderful! Thank you. You have great support! Like CyberPanel.

Dear Sir usman Nasir sb this link
this link very help full
How To Set HSTS Header (Strict-Transport-Security) Using CyberPanel (OpenLiteSpeed)