Clicking on save in the show post page generates an error

[tindrew]

Clicking save on show page if comment field is empty returns an error

key :tags not found in: %{action: "/posts", changeset: #Ecto.Changeset<action: :insert, changes: %{post_id: 7}, errors: [content: {"can't be blank", [validation: :required]}], data: #Blog.Comments.Comment<>, valid?: false>, conn: %Plug.Conn{adapter: {Plug.Cowboy.Conn, :...}, assigns: %{changeset: #Ecto.Changeset<action: :insert, changes: %{post_id: 7}, errors: [content: {"can't be blank", [validation: :required]}], data: #Blog.Comments.Comment<>, valid?: false>, current_user: #Blog.Accounts.User<meta: #Ecto.Schema.Metadata<:loaded, "users">, id: 1, email: