Arduino MKR NB 1500 OTA

Hello, I’m trying to update firmware with OTA functionality using this example:

Example without OTA is working / gets a connection to my thinger dashbaord.
Visual Studio Code extension is installed. Connection to thinger project is established (no red rocket)
Adapted firmware with an instance of ThingerMKRNBOTA => ThingerMKRNBOTA ota(thing);
Will causes in:

  • Arduino mobile connection to thinger server get lost
  • Arduino Windows COM Port isn’t available anymore
  • Restart, Power Off/On => no improvement
    Re-flashing with bootloader mode is the only way to bring Arduino back to live.
    Anybody can help?