WordPress - Timber - Single post not rendering

I am trying to render a single post: single-walkthroughs.php -> single-walkthroughs.twig however the page displays: "Sorry, we couldn't find what you're looking for."

Here's what I have:
code that renders the custom post type in functions.php

$labels = array(
            'name'               => 'Walkthroughs',
            'singular_name'      => 'Walkthrough',
            'menu_name'          => 'Walkthroughs',
            'name_admin_bar'     => 'Walkthrough',
            'add_new'            => 'Add New',
            'add_new_item'       => __( 'Add New Walkthrough' ),
            'new_item'           => __( 'New Walkthrough' ),
            'edit_item'          => __( 'Edit Walkthrough' ),
            'view_item'          => __( 'View Walkthrough' ),
            'all_items'          => __( 'All Walkthroughs' ),
            'search_items'       => __( 'Search Walkthroughs' ),
            'parent_item_colon'  => __( 'Parent Walkthroughs:' ),
            'not_found'          => __( 'No walkthroughs found.' ),
            'not_found_in_trash' => __( 'No walkthroughs found in Trash.' )
        );

        $args = array(
            'labels'             => $labels,
            'description'        => __( 'Walkthroughs.'),
            'public'             => true,
            'publicly_queryable' => true,
            'show_ui'            => true,
            'show_in_menu'       => true,
            'query_var'          => true,
            'rewrite'            => array( 'slug' => 'walkthroughs' ),
            'capability_type'    => 'post',
            'has_archive'        => true,
            'hierarchical'       => false,
            'menu_position'      => null,
            'menu_icon'          => 'dashicons-list-view',
            'taxonomies'         => array( 'category' ),
            'supports'           => array( 'title', 'editor', 'thumbnail' )
        );
        register_post_type( 'walkthroughs', $args );

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Code that renders walkthroughs page
page-walkthroughs.php

<?php
$context = Timber::get_context();
$args = array(
    'post_type' =>  'walkthroughs',
);
$context['posts'] = Timber::get_posts($args);
Timber::render( array( 'page-' . $post->post_name . '.twig', 'page.twig' ), $context );

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page-walkthroughs.twig

{% extends "base.twig" %}

{% block content %}
    <div class="content-wrapper">
        <article class="post-type-{{post.post_type}}" id="post-{{post.ID}}">
            <section class="article-content">
                <h1 class="article-h1">{{post.title}}</h1>
                <div class="article-body">
                    {{post.content}}
                </div>
            </section>
        </article>
    </div><!-- /content-wrapper -->
    <div>
        {% for post in posts %}
            <h2><a href="{{ post.link }}">{{ post.post_title }}</a></h2>
            <div>{{ post.post_content|wpautop }}</div>
        {% endfor %}
    </div>
{% endblock %}

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Code that SHOULD render a single page
single-walkthroughs.php

<?php
$context = Timber::get_context();
$post = Timber::query_post();
$context['post'] = $post;

if ( post_password_required( $post->ID ) ) {
    Timber::render( 'single-password.twig', $context );
} else {
    Timber::render( array( 'single-' . $post->post_type . '.twig', 'single.twig' ), $context );
}

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single-walkthroughs.twig

{% extends "base.twig" %}

{% block content %}
    <div class="content-wrapper">
        <article class="post-type-{{post.post_type}}" id="post-{{post.ID}}">
            <section class="article-content">
                <h1 class="article-h1">{{post.title}}</h1>
                <p class="blog-author">
                    <span>By</span><a href="{{post.author.path}}"> {{ post.author.name }} </a><span>&bull;</span> {{ post.post_date|date}}
                </p>
                <div class="article-body">
                    {{post.content}}
                </div>
            </section>
        </article>
    </div><!-- /content-wrapper -->
{% endblock %}

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Any help is appreciated.