Enable persistent logging in LE settings. Enable debug logging in Kodi. Reboot to generate clean logs. Then connect a USB drive and copy logs from the following locations to the USB drive using the Kodi file manager:
/storage/.cache/log/journal/*
/storage/.kodi/temp/kodi.log
Use the LE12 image as the LE11 codebase is now EOL and will not receive fixes (only add-on bumps).