Thank you for your reply.
I tried using 'git submodule sync --recursive' prior to 'git submodule update --init --recursive' but this didn't solve the problem: the checkout of '005c5cefc22aaf0396e4327ee7f2e0ad32a7733b' of openthread still fails.

I managed to complete compilation with ESP-IDF v5.4.1 by manually downloading and replacing the openthread submodule: openthread.jpg


So my problem is basically solved. Anyway, could you please elaborate a bit about the problem with openthread checkout? Is this a known problem or did I do ...

Hello,

I'm testing ESP32-C6 (ESP32-C6-DevKitC-1) with Espressif's SDK for Matter.

My project requires to use Matter version 1.4.2 and Matter-over-Thread communication.
I have configured a development environment inside a Virtual Machine with Ubuntu 24.04.3 LTS.
I got the required repositories (ESP ...