Fixed an exception with end

src/AutoConnect.cpp

@@ -380,7 +380,6 @@ bool AutoConnect::_getConfigSTA(station_config_t* config) {
  *  Stops AutoConnect captive portal service.
  */
 void AutoConnect::end(void) {
-  _responsePage.reset();
   _currentPageElement.reset();
   _ticker.reset();
   _update.reset();

src/AutoConnect.h

@@ -220,7 +220,7 @@ class AutoConnect {
  public:
   AutoConnect();
   AutoConnect(WebServerClass& webServer);
-  ~AutoConnect();
+  virtual ~AutoConnect();
   bool  begin(void);
   bool  begin(const char* ssid, const char* passphrase = nullptr, unsigned long timeout = AUTOCONNECT_TIMEOUT);
   bool  config(AutoConnectConfig& Config);