how to activate litespeed

#1
I bought an unmanaged linux vps from hosting.com, and bought litespeed site owner license from it. Hosting first installed a clean Almalinux 9 system and then I installed DirectAdmin panel, and installed litespeed trial version using DA Build command according to DA's tutorial.

Hosting told me to activate the license using below command: sudo /usr/local/lsws/bin/lshttpd -r
It got this: [ERROR] serial.no is missing!

How to solve this?
 
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