Hi, I had the same issue I (39) boot: ESP-IDF -128-NOTFOUND 2nd stage bootloader I'm using Windows 10 and IDF 4.0. I installed Python 3.7 and esp-idf release/v4.0 with this installer esp-idf-tools-setup-2.3.exe I got this message when I was building an app (bootloader section) -- Project is not insi...