In the future, post your code in text format, not screenshots. See Requesting Help to learn how to do this.
So, your first.md
still has invalid front matter. You changed the ---
to +++
, but did not convert the remaining variables to TOML syntax. It needs to be:
+++
title = "First"
date = "2018-11-03"
draft = false
[[testitem]]
title = "A Title"
description = "A Description"
+++
Also see the hugo docs on example configuration. They show the difference between YAML/TOML/JSON.