Hugo has been making this warning for a while
WARN found no layout file for "html" for kind "term": You should
create a template file which matches Hugo Layouts Lookup Rules for
this combination.
This turned out to be the addition of the `groups:` keyword to the
command frontmatter. Hugo is doing something with this keyword though
this isn't documented in the frontmatter documentation.
The fix was removing the `groups:` keyword from the frontmatter since
it was never used by hugo.
Nick Craig-Wood
Pieter van Oostrumandalbertony