@hata its a conflict with the anomaly plugin you are using. quick solution is to recompile the anom plugin without the "Megablock.cs" file.
The link explains it all perfectly. in your case you need to add <HEADERS(X-Xsrf-Token)> to your actual headers. don't need to parse it. As ruri said
"After a REQUEST block, the dictionary variables COOKIES and HEADERS, are automatically filled with keys and values received from the server."
@rurifriend Translators exist for a reason. Also to Ruri Italian IS the main language lol