AdvancedWebServer example fails to compile for a Nano RP2040 Connect with Arduino-Pico version 2.6.3

[stefat]

Settings:

Hw Mac Apple Silicon M1Pro
macOS Ventura 13.0.1
Arduino IDE 1.8.19
Nano RP2040 Connect sdk core: Arduino-pico core rp2040 version 2.6.3

The Issue:
I'm using a Nano RP2040 Connect compiling the AdvancedWebServer example at this path:
~/Library/Arduino15/packages/rp2040/hardware/rp2040/2.6.3/libraries/WebServer/examples/AdvancedWebServer/AdvancedWebServer.ino
The IDE at compiling time does this error:
~/Library/Arduino15/packages/rp2040/tools/pqt-gcc/1.4.0-c-0196c06/bin/../lib/gcc/arm-none-eabi/10.3.0/../../../../arm-none-eabi/bin/ld: ~/Documents/Arduino/BUILD DATA/sketch/AdvancedWebServer.ino.cpp.o: in function setup:
~/Documents/Arduino/SW CPU RP2040/SW core Arduino Pico/SA RP2040/TEST/AdvancedWebServer/AdvancedWebServer.ino:123: undefined reference to ZN9WiFiClass5beginEPKcS1
collect2: error: ld returned 1 exit status

The code:
The error is related at line 123 WiFi.begin(ssid, password) in the setup function:
void setup(void) { pinMode(led, OUTPUT); digitalWrite(led, 0); Serial.begin(115200); WiFi.mode(WIFI_STA); WiFi.begin(ssid, password); Serial.println(""); //........ }
ssid and password have been set, as usual, with my current Wifi authentication.

Thank you for any idea on this.