AFAIK, the problematic error message is the following:
.../Documentation/out-www/it/it/usage/updating.texi:14: This command
can appear only outside of any environment, not in environment
@raggedright.
This means that somewhere before line 14 of `updating.texi` – most
certainly in another file – the `raggedright` environment wasn't
properly closed.
We don't use the `raggedright` environment directly. Instead, we use
the `@raggedRight` and `@endRaggedRight` macros.
Note that `@endRaggedRight` isn't normally used directly either;
instead, they are part of the `@endmorerefs` and `@endpredefined`
macros.
My conclusion: In a file included before `updating.texi`, you are
missing either `@endmorerefs` or `@endpredefined`.