I reported this upstream here: https://github.com/hughsie/lvfs-
website/issues/335
It looks like it's related to the metadata being too big.
** No longer affects: appstream-glib (Ubuntu)
** Bug watch added: github.com/hughsie/lvfs-website/issues #335
That message is coming from appstream-glib, somewhere around here:
https://github.com/hughsie/appstream-
glib/blob/843caabdeca6ae15f400f38536bc666340c30465/libappstream-glib/as-
store.c#L2329
I would recommend to start out with trying a newer appstream-glib to see
if that helps.
** Also affects:
