php files are downloading instead of executing on the Browser ( Stack Wordpress + Openlitespeed )

I built a droplet with a Marketplace stack ( Ubuntu 20.x+Openlitespeed+MariaDB+Wordpress) and it was so far. But today the site isn’t loading instead php files are downloading when visiting the site.

Can someone help me out with how to fix this issue? domain:


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It means no PHP external application or handler for the PHP file. But the site loads fine from my end now. FYI, I’d recommend you try the LSCache plugin instead of using x-mod-pagespeed for better performance.