I can't configure Varnish with Prestashop - prestashop-1.7

Question

i am setting varnish
from this url https://github.com/nexylan/varnish-prestashop/blob/master/vcl/varnish4.vcl
and the error I'm having is I can't enter the prestashop admin and the other problem is that when I add products to the cart it doesn't save them
Thank You.
# disable cookies for static files
if (req.url ~ "\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|swf|pdf)$" && ! (req.url ~ "\.(php)") ) {
unset req.http.Cookie;
return (hash);
}
# pipe on weird http methods
if (req.method !~ "^GET|HEAD|PUT|PATCH|POST|TRACE|OPTIONS|DELETE$") {
return(pipe);
}
if (req.method == "GET" && (req.url ~ "^/?mylogout=")) {
unset req.http.Cookie;
return (pass);
}
#we should not cache any page for Prestashop backend
if (req.method == "GET" && (req.url ~ "^/admin")) {
return (pass);
}
#we should not cache any custom directory
if (req.method == "GET" && (req.url ~ "^/custom")) {
return (pass);
}
#we should not cache any page for customers
if (req.method == "GET" && (req.url ~ "^/authentification" || req.url ~ "^/mon-compte")) {
return (pass);
}
#we should not cache any page for customers
if (req.method == "GET" && (req.url ~ "^/informations" || req.url ~ "^/unt.php")) {
return (pass);
}
#we should not cache any page for sales
if (req.method == "GET" && (req.url ~ "^/commande" || req.url ~ "^/historique")) {
return (pass);
}
#we should not cache any page for sales
if (req.method == "GET" && (req.url ~ "^/adresse" || req.url ~ "^/order-detail.php")) {
return (pass);
}
#we should not cache any page for sales
if (req.method == "GET" && (req.url ~ "^/order-confirmation.php" || req.url ~ "^/order-return.php")) {
return (pass);
}
#we should not cache any module
if (req.method == "GET" && req.url ~ "^/module") {
return (pass);
}
if (req.method != "GET" && req.method != "HEAD") {
return (pass);
}