I've sent by email the tgz dump from MakeMKV + the MKB_RO.inf taken from the UHD disc of "Kaamelott Volet 2 - Partie 1", released on 28-02-2026.
Hope this is the right way
You need to email just the TGZ dump file to svq@makemkv.com. However, you could also upload both the TGZ file and MKB_RO.inf file into (say) OneDrive or Google Drive, and then reply here with public download links, as this would help people add your disk to the public KEYDB.cfg file as well.
No worries. I think the latest KEYDB.cfg file already contains your disk. Have you tried downloading it, copying it into MakeMKV's data directory (i.e. the same directory where MakeMKV also writes its TGZ dump files) and restarting MakeMKV?