Esp32 BLE server device to connect 3 client device

Hi,
I am making an application in which one esp32 ble should be connect with other esp32 and also should connect with a mobile Bluetooth simultaneously.
For that i am using NimBLE-Arduino library with Aarduino framework and running their NimBLE_Server example. But it is not working.
Please guide me what should i do.

Welcome to the forum

Exactly which version of the ESP32 are you using ?