Fix VCL.

config/varnish/default.vcl

@@ -5,6 +5,7 @@ include "hit-miss.vcl";
 
 # import vmod_dynamic for better backend name resolution
 import dynamic;
+import vmod_dynamic
 import std;
 
 backend default {
@@ -30,12 +31,12 @@ sub vcl_recv {
   # Cache static files
   if (req.url ~ "\.(css|js|avif|webp|png|jpe?g|gif|ico|svg|woff2?|eot|ttf|otf|json|csv|pdf|mp4|webm|ogg|mp3|wav|flac)$") {
     unset req.http.Cookie;
-    return(hash);
+    return(pass);
   }
   
   # Remove all cookies for other requests
   unset req.http.Cookie;
-  return(hash);
+  return(pass);
 }
 
 sub vcl_backend_response {