Webp on Nginx not working anymore

Hi,
after the last update the nginx settings are broken and not working anymore.
I use Nginx Proxy with Apache on Plesk with the following rules:

# WebP Express rules
# ——————–
location ~* ^/wp-content/.*\.(png|jpe?g)$ {
add_header Vary Accept;
expires 365d;
}
location ~* ^/wp-content/.*\.webp$ {
expires 365d;
if ($whattodo = AB) {
add_header Vary Accept;
}
}
if ($http_accept ~* “webp”){
set $whattodo A;
}
if (-f $request_filename.webp) {
set $whattodo “${whattodo}B”;
}
if ($whattodo = AB) {
rewrite ^(.*) $1.webp last;
}
if ($whattodo = A) {
rewrite ^/wp-content/.*\.(jpe?g|png)$ /wp-content/plugins/webp-express/wod/webp-on-demand.php?xsource=x$request_filename&wp-content=wp-content break;
}
# ——————- (WebP Express rules ends here)

What’s different now?
Thank you in advance and greetings from Austria
Lukas

(and of corse thank’s for the awesome plugin!)