Make sure you have at least the php-gd or php-imagick extension installed. There is currently no supported converter installed on your server.

These are the supported converters, make sure one of them is available: https://github.com/OFFLINE-GmbH/oc-responsive-images-plugin/blob/develop/webp.php#L60

If you've got the same header after the installation the webP library still isn't picking it up correctly.

Does php -m | grep -i imagick return a value? Do you have enabled the library for the correct PHP version?

You don't have to re-install or reset anything on the plugin side. Once a supported converter is available, the image should be served.

We are using this library, maybe you will find something in their issues/docs: https://github.com/rosell-dk/webp-convert

Hi, I have configured my nginx as described, have GD 2.2.5 installed and images are not converted to webp. regards.