NGINX PHP Warning imagewebp Palette image not supported by webp

imagewebp(): Palette Image Not Supported by Webp Tail your NGINX website error log tail -n 100 -f /var/log/nginx/yournginxsite.error.log | grep error Error log Running wordpress using the themify-ultra theme if you see the following NGINX PHP webp error in your sites error log, continue reading for the fix: # Truncated error PHP message: PHP Warning: imagewebp(): Palette image not supported by webp in /themify-ultra/themify/img.php on line 656 while reading response header from upstream, client: x.x.x.x, server:, request: “POST /wp-admin/async-upload.php HTTP/2.0”, upstream: “fastcgi://unix:/run/php/php7.4-fpm-4kib.sock:”, host: “”, referrer: “” # Full error 2023/01/23 11:24:54 [error] 21839#21839: *16185 FastCGI sent in stderr: “PHP