maybe I broke my Zigbee 3.0 USB Dongle Plus

[IngiDingi]

Hi.

Today I tried to use the https://darkxst.github.io/silabs-firmware-builder/ to flash my Zigbee 3.0 USB Dongle Plus to the MulitPAN (RCP).
The deice was recongnized by the browser in COM 6 and I allowed connection.
After choosing the firmware I started the process.
But it was stuck at 0% for 10min so I decided to cancel this process and start from scratch on another PC.

This is now the issue on the other PC:

Here is the LOG:
silabs_flasher.log

I tried to recover the original firmware useing SecureCRT but I can not connect to the Zigbee 3.0 USB Dongle Plus at all.
Activating the bootlader in itself is not even possible anymore I guess.
I tried this method:

"Manual mode"
Keep pressing the Boot button, restart the device, and release the Boot button after Dongle
enters the serial port Bootloader

Thisis what I see in Secure CRT when I am connected and try to upload the firmware:

[darkxst]

The only way to brick dongle is to flash incorrect bootloader, in all other cases you should be able to recover using the internal boot button.

[tootla]

I agreed with darkxst. I thought that ZBDongle didn't enter the bootloader when you manually flashed the firmware, because after entering the bootloader, the menu should have appeared on SecureCRT.

[IngiDingi]

Hi. Thx for your reply. Today I tried with my old Laptop and with this I was able to flash again. Something which is similar on my PCs is blocking the communication.