HSTS not working

[fw2ty]

Hello everyone, I tried to add HSTS to my website but it seems to not be working.
Since I'm not using cPanel or Plesk I tried the method shown in "Using LSWS-Native Configs" section here:
https://www.litespeedtech.com/support/wiki/doku.php/litespeed_wiki:config:hsts-setup

After a graceful restart, HSTS is still not there. I have tried different versions of syntax but to no success.

Anything I can do to fix it?

 

[Lubos]

The only difference I'm seeing in my settings is I leave Location blank and I add subdomains to the directive

Strict-Transport-Security: max-age=63072000; includeSubDomains

 

[fw2ty]

The only difference I'm seeing in my settings is I leave Location blank and I add subdomains to the directive

Strict-Transport-Security: max-age=63072000; includeSubDomains

I managed to fix it, so I will leave the answer here if anyone else has the same problem.
I am using WordPress installation on Google Cloud Platform, so I had to add the header to wordpress Virtual Host instead of Example Virtual Host I was adding it to previously. On the screenshot below there is a command that worked for me. Just be sure to go to Virtual Hosts -> wordpress -> Context -> Add (+) and then add Context as shown in the screenshot below.

 

[scottnzuk]

Strict-Transport-Security: max-age=63072000; includeSubDomains; preload

needs preload on end.