You should uninstall all existing caching plugins from your WordPress admin area. Examples include WPRocket, W3 Total Cache, Hummingbird etc.
Log into cPanel and click on the LiteSpeed Web Cache Manager link.
Click WordPress Cache.
Click Scan to detect your WordPress installations.
Click Enable on the installations that you wish to enable caching for.
If you get an error, please double check that all existing cache plugins are disabled and deleted.
In your WordPress admin area, you can now manage the cache configuration.
We recommend applying one of the presets for optimal configuration.