CMSIS-DAP cannot read IDR

Hi, Tjaekel, thank you for your reply!
I am new to DAP debugging. I don't know what are ITM messages.

The script running on the DUT is a trial to communicate with an Adafruit SPI FLASH RAM. Tried to read the capacity info of the SPI FLASH. Since I received a 0 value I wanted to try debugging.

Since the DAP communication is failing I did not arrive to the point where I can receive, via de Picoprobe, the print output of the DUT (using the UART data).

I just want to try the 'road' that the documentation for the RPi Pico describes. Setting up other type of debugging environments needs the installation of a lot of other tools. I want to keep it simple.
What I am trying to do is for a hobby project and via debugging also to learn more about controlling this type of MCU.

The RPi Pico H is flashed with the latest Picoprobe fw of Nov 11, 2022.

The hardware is wired according to Getting started with Pico, Appendix A : 'Using Picoprobe', image on page 63.

DUT                                      Picoprobe
-------------                            ----------------
SWDCLK                                   (GP2) pin 5
SWDIO                                    (GP3) pin 6
GND                                      GND
VSYS                                     VSYS         (DC Voltage measured: 5.2 V)
UART0 TX/RX (GP0/GP1)                    UART1 (GP4/GP5)

I made and annotated another image of the latest dialogue that I saw happening on an oscilloscope when, while using the Arduino IDE v2.0.3, press the 'Start debugging' button. The frequency set is as in the Raspberry Pi documentation: 5000 kHz (5 MHz).

The Picoprobe has the following USB and COM attached.