Can you confirm what version of Mojo you're using, and what specific command you're running that triggers this error? It looks like it's invoking code that should only be triggered for a project of LXC container type. Can you also include the contents of /srv/mojo/$MOJO_PROJECT/$MOJO_SERIES/.project ? That should confirm it's a containerless project in the containerclass variable.
Can you confirm what version of Mojo you're using, and what specific command you're running that triggers this error? It looks like it's invoking code that should only be triggered for a project of LXC container type. Can you also include the contents of /srv/mojo/ $MOJO_PROJECT/ $MOJO_SERIES/ .project ? That should confirm it's a containerless project in the containerclass variable.