pwafire: Files not Working Offline | PHP Build

Describe the bug I was working on a PHP project with file path /index.php and includes /includes/header.php Installed service worker in index.php before closing body. PWA works fine and Installs on Mobile and Desktop. But I ran Light House audits check and discovered that the app does not work Offline. Seem my return cache.addAll([ is not catching php files? What could be wrong?

Expected behavior PWA should work Offline

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari] [ x ]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]