By installing the LiteSpeed Cache plugin, you can take advantage of our super-fast server side cache for your WordPress website.
First of all, disable any other page caches as these could interfere with LiteSpeed Cache.
Then you need to download the plugin from here.
Skip to Step 2 and click download LSCache module 1.2.5
Now, log in to your PrestaShop admin console.
Now go to Configure and underneath this Advanced Parameters and click Performance.
From here make sure the setting Disable all overrides is set to No as seen below.
To install the plugin go to Modules and then just below it Modules Manager
Now click Upload a Module and select the LiteSpeed Cache PrestaShop file.
Enable the module by going to LiteSpeed Cache followed by Settings and setting LiteSpeed cache to Yes.