Loading cache...done.
Loaded 2083 entries from dependency cache.
NOTE: Resolving any missing task queue dependencies
ERROR: Nothing RPROVIDES '#' (but /home/xen/R-Car-AGL/poky/../meta-agl-demo/recipes-platform/images/agl-demo-platform.bb RDEPENDS on or otherwise requires it)
NOTE: Runtime target '#' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['#']
ERROR: Required build target 'agl-demo-platform' has no buildable providers.
Missing or unbuildable dependency chain was: ['agl-demo-platform', '#']

Summary: There were 2 ERROR messages shown, returning a non-zero exit code.