Flashing on the Nicla Voice

hey i try to flash my impulse but it fails always, my nicla voice has a always glowing green LED and in the process of flashing it starts blinking blue, but then it goes green again.

Finding Arduino Mbed Nicla 4.0.8…
arduino:mbed_nicla 4.5.0 4.5.0 Arduino Mbed OS Nicla Boards
Finding Arduino MBED core OK
Finding Nicla Voice…
Finding Nicla Voice OK at COM10
Flashing Arduino firmware…
Open On-Chip Debugger 0.11.0+dev-gab95bac57-dirty (2021-05-11-10:45)
Licensed under GNU GPL v2
For bug reports, read
OpenOCD: Bug Reporting
debug_level: 0

swd
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x00006654 msp: 0x20010000
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x00006654 msp: 0x20010000
** Programming Started **
** Programming Finished **
shutdown command invoked
Neuer Upload-Port: COM10 (serial)
Drücken Sie eine beliebige Taste . . .
Please wait target to reboot

Gewartet wird 0 Sekunden. Drücken Sie STRG+C, um den Vorgang zu beenden…
Finding Nicla Voice…
Writing synpkg to flash, skipping if present…
Welcome to ei uploader
Port to use: COM10
Nicla Voice not answering!
Writing NN model OK

Alexa Demo works fine, i can send code via Arduino, but cant flash the impulse with flash.windows.bat

And not sure why it stays the whole time green. Tested with reset Button alot but still cant flash. Please help, i am new to all of that.