License Invalid

[AmanWills]

I installed varnish as a cache proxy but I get Lic Invalid. But when I turn it off everything works fine. How can I fix this?

[AmanWills]

my code:

 

backend default {
.host = "127.0.0.1";
.port = "8080";
}
acl purge {
"127.0.0.1";
}
sub vcl_recv {
#cloudflare
 remove req.http.X-Forwarded-For;
 if (req.http.cf-connecting-ip) {
   set req.http.X-Forwarded-For = req.http.cf-connecting-ip;
 } else {
   set req.http.X-Forwarded-For = client.ip;
 }
# Remove has_js and CloudFlare/Google Analytics __* cookies.
 set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(_[_a-z]+|has_js)=[^;]*", "");
 # Remove a ";" prefix, if present.
 set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");
# Let's make sure we aren't compressing already compressed formats.
if (req.http.Accept-Encoding) {
if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|mp3|mp4|m4v)(\?.*|)$") {
remove req.http.Accept-Encoding;
} elsif (req.http.Accept-Encoding ~ "gzip") {
set req.http.Accept-Encoding = "gzip";
} elsif (req.http.Accept-Encoding ~ "deflate") {
set req.http.Accept-Encoding = "deflate";
} else {
remove req.http.Accept-Encoding;
}
}
if (req.request == "PURGE") {
if (!client.ip ~ purge) {
error 405 "Not allowed.";
}
return(lookup);
}
if (req.url ~ "^/$") {
unset req.http.cookie;
}
}
sub vcl_hit {
if (req.request == "PURGE") {
set obj.ttl = 0s;
error 200 "Purged.";
}
}
sub vcl_miss {
if (req.request == "PURGE") {
error 404 "Not in cache.";
}
if (!(req.url ~ "wp-(login|admin)")) {
unset req.http.cookie;
}
if (req.url ~ "^/[^?]+.(jpeg|jpg|png|gif|ico|js|css|txt|gz|zip|lzma|bz2|tgz|tbz|html|htm)(\?.|)$") {
unset req.http.cookie;
set req.url = regsub(req.url, "\?.$", "");
}
if (req.url ~ "^/$") {
unset req.http.cookie;
}
}
sub vcl_fetch {
if (req.url ~ "^/$") {
unset beresp.http.set-cookie;
}
if (!(req.url ~ "wp-(login|admin)")) {
unset beresp.http.set-cookie;
}
}
sub vcl_pipe {
       set bereq.http.connection = "close";
       if (req.http.X-Forwarded-For) {
               set bereq.http.X-Forwarded-For = req.http.X-Forwarded-For;
       } else {
               set bereq.http.X-Forwarded-For = regsub(client.ip, ":.*", "");
         }
   }
   sub vcl_pass {
       set bereq.http.connection = "close";
       if (req.http.X-Forwarded-For) {
               set bereq.http.X-Forwarded-For = req.http.X-Forwarded-For;
       } else {
         set bereq.http.X-Forwarded-For = regsub(client.ip, ":.*", "");
         }
   }