Cannot load manifest.json file

Hi all,

I have create a manifest.json file and put it the root same place of index.php file and try to load in in the header tag using the below:

<link rel="manifest" href="manifest.json">

But it cannot be loaded, server response with 404 in the console.
Anyone experiencing the same issue or know how to load manifest for CI, please help me.

Thanks a lot!

Regards,
Son