expected type-specifier before 'AsyncJsonResponse'

[jitu167]

I want to JSON Object but I am getting this error.

AsyncJsonResponse * response = new AsyncJsonResponse();
'JsonObject' was not declared in this scope
JsonObject& root = response->getRoot();
'root' was not declared in this scope
JsonObject& root = response->getRoot();

A snippet of my code:-
server.on("/status", HTTP_GET, [] (AsyncWebServerRequest *request) {

AsyncJsonResponse * response = new AsyncJsonResponse();
response->addHeader("Server","ESP Async Web Server");
JsonObject& root = response->getRoot();

[mathieucarbou]

Ref - Duplicate of: #187