Hi Paul,
I have 2 quick troubleshooting steps for you to try.
#1 Create a new PHP file with the following code, upload it, and run it on your site.
<?php
if(function_exists('imagecreatefromwebp')) {
echo 'imagecreatefromwebp() is available';
} else {
echo 'imagecreatefromwebp() is NOT available';
}
?>
#2 Create a new section editor with an upload field, but uncheck all of the resize/thumbnail options. Make sure the Use WebP option is enabled in the General Settings. Then try to upload a JPG file in that editor. We just want the JPG file to be uploaded and converted. I want to see if the problem is specific to the imagecreatefromwebp() function or if none of the webp-related functions are working.
Thanks
Michael Sams
Programmer
interactivetools.com