Basically `adapt` expects that `images.linuxcontainers.org` is a LXD-protocol server, it doesn't know about our transition to simplestreams starting at around LXD 2.0.4 (August 2016) and those image servers have not actually supported that older API for a long time now.
Basically `adapt` expects that `images. linuxcontainers .org` is a LXD-protocol server, it doesn't know about our transition to simplestreams starting at around LXD 2.0.4 (August 2016) and those image servers have not actually supported that older API for a long time now.