I was unable to connect to the new prototype board MCU because I didn’t keep the App updated. It sounds like a nonsense but it’s not. The new microcontrollers are comming quickly and I failed keeping track with them. The new STM32H503 is so new that my previous version 2.6.0 of the STM32CubeProgrammer failed connecting to it. I have to admit I failed troubleshooting it because I asked for a help on the customer’s side. And yes, I was adviced to update the App. Keep your tools updated!
Keep your tools updated