Can´t start debug session anymore

Hi Guillermo,

Thank you for your feedback.

Moving a project
How was the project moved? Using Source Control management or by copying and pasting all program files? If the second option then we recommend removing the BUILD folder. It may have some absolute paths that are relative to your first PC.
Have you also used a shared Mbed OS version? (Managing libraries - Managing libraries | Mbed Studio Documentation). Please keep in mind that when shared version is used the simple copying and pasting the program will not work as Mbed OS will not be copied as a program contains just a symlink to the Mbed OS that is relative to your first PC.
We recommend using Source Control Management when working on the same program across multiple systems. You can find more about it here: Working with Git - Source control | Mbed Studio Documentation

Debug
What board are you using? Unfortunately, Mbed Studio does not yet support debugging all Mbed boards. We are working on improving our debugger and adding more boards.
I can confirm that not supporting the debug for CY8CPROTO-062-434W board is a regression in version 1.2.0. We are working on a fix.
A PR has already been added to pyOCD for it: Fixed case of cy8c6xxa target in board ID list by mcgordonite · Pull Request #944 · pyocd/pyOCD · GitHub

Thanks,
Arek - Mbed Studio team