Bangle.js App Loader returns "Upload failed, Unexpected response"

I ran this

setTimeout(function() { NRF.restart(function(){
poke32(0x4001e504,2);while(!peek32(0x4001e400)); // enable flash erase
poke32(0x4001e514,1);while(!peek32(0x4001e400)); // erase whole uicr
poke32(0x4001e504,1);while(!peek32(0x4001e400)); // enable flash writing
poke32(0x10001014,0x7A000);while(!peek32(0x4001e400)); // set bootloader
poke32(0x10001018,0x7E000);while(!peek32(0x4001e400)); // set mbr settings
poke32(0x1000120c,0xfffffffe);while(!peek32(0x4001e400)); // NFC pins as GPIO
poke32(0x4001e504, 0);while(!peek32(0x4001e400)); // disable flash writing
});}, 2000);NRF.disconnect();

on puckjs v2.0b and not nothing seems to be working :( How can I recover?
I am not able to get into dfu mode