Help to solve an error with the Raspberry Pi Pico 2 board

[Motokegor]

I'm trying to upload a sketch as described here https://github.com/earlephilhower/arduino-pico?tab=readme-ov-file#uploading-sketches but it's not clear whether it works or not. I press the Start Debugging button and the error shown on the screenshot pops up.

[maxgerhardt]

"unable to find matching CMSIS device" is telling you that OpenOCD can't find a debugger probe.

For debugging to work, you need to have an external debugging probe attached to the SWD pins of your Pico 2 board. One such way is to take a second Pico (RP2040) or "DebugProbe" and load the https://github.com/raspberrypi/debugprobe/releases firmware firmware on it (e.g., debugprobe_on_pico.uf2), and then connect that debug probe according to https://datasheets.raspberrypi.com/pico/getting-started-with-pico.pdf, Appendix A.