hi,
to try Mga10/cauldron, check which mirrors support cauldron =>
https://mirrors.mageia.org/status download a Mga9 net install and burn to bootable media or start a Virtual Box instance, and then start the installation..
when asked for a mirror, select one that also supports cauldron, and then edit the URL by changing the "9" to "cauldron".
the install should complete normally
cheers