Sonoff Zigbee Bridge Pro, Problems with Firmwareupgrade on Berry Console

[Patrix2911]

Hello. First of all, I hope I’m posting in the correct forum. I purchased a Sonoff Zigbee Pro Bridge and flashed it according to this guide (https://notenoughtech.com/home-automation/tasmota-on-sonoff-zb-bridge-pro/#google_vignette). The installed Version is tasmota 14.5.0 I’ve reached the ‘cc.flash’ point in the Berry console, but I’m getting the following error:

FLH: Flashing started (takes 5-8 minutes during which Tasmota is unresponsive)
stack traceback:
: in function flash
: in function main

I’ve tried with the file ‘SonoffZBPro_coord_20220219.hex’ and also with ‘SonoffZBPro_coord_20240710.hex’. Unfortunately, I keep getting the same error. I’m not very experienced with this, so could someone please help me?

Thank you very much, Patrick.