Assets empty when using text editor

When adding a blog post...

If I try to add an image in the textarea, using redactor, the 'Select An Asset' modal is empty, but should be full of images used elsewhere on the site. If I go to upload an image, it doesn't appear in the same assets modal to then add to the post, BUT it does appear if I search for it in the same modal and it does appear in the general assets area.

Perch: 3.0.9, PHP: 7.0.1, MySQL: mysqlnd 5.0.12-dev - 20150407 - $Id: 7e72f9690b1498a1bead7a637c33a831c0d2f655 $, with PDO
Server OS: Linux, cgi-fcgi
Installed apps: content (3.0.9), assets (3.0.9), categories (3.0.9), perch_blog (5.5.1)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_blog', );
PERCH_LOGINPATH: /perch
PERCH_PATH: /var/sites/0/05creative.com/public_html/perch
PERCH_CORE: /var/sites/0/05creative.com/public_html/perch/core
PERCH_RESFILEPATH: /var/sites/0/05creative.com/public_html/perch/resources
Image manipulation: GD
PHP limits: Max upload 100M, Max POST 100M, Memory: 128M, Total max file upload: 100M
F1: 3b606135b33e6a102526838f4152a807
Resource folder writeable: Yes
DOCUMENT_ROOT: /var/sites/0/05creative.com/public_html
HTTP_HOST: 05creative.com
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php

post.html

<article class="h-entry">

    <div class="post-header">
        <div class="row padded featured-img">
            <div class="small-7 small-centered columns post-title">
                <h1 class="font-two">
                    <perch:blog id="postTitle" type="text" label="Title" required="true" size="xl autowidth" order="1" value="true" />
                </h1>
            </div>
        </div>
    </div>

    <div class="row padded featured-img">
        <div class="small-12 medium-7 small-centered medium-centered columns post-title">

            <perch:if exists="image"><img class="blog-list-img" src="<perch:blog id="image" type="image" density="2" quality="85" crop="true" width="365" height="246"/>" alt="<perch:blog id="altTag" type="text" label="Image Alt Text" required="true" />" /></perch:if>
        </div>
        <div class="small-12 medium-7 small-centered medium-centered columns post-title">
            <div class="blog-description e-content">
                <perch:blog id="postDescHTML" type="textarea" label="Post" order="2" editor="redactor" html="true" size="xxl autowidth" required="true" />
            </div>
        </div>
        </div><!-- .columns -->
    </div><!-- .row -->

     <div class="row padded">
        <div class="small-12 medium-7 small-centered medium-centered columns">

            <div class="blog-author-share">
                <p class="blog-author small-12 medium-6 columns">BY <perch:blog id="author" type="text" label="Author" order="2"    markdown="true" size="m" required="true" /><br>
                <time class="dt-published" datetime="<perch:blog id="postDateTime" type="date" label="Date" time="true" format="Y-m-d H:i:s" divider-before="Publishing" />">
                <perch:blog id="postDateTime" type="date" time="true" format="%d %B %Y" /> 
                </time>
                </p>
            </div><!-- .blog-author-share -->

                <p class="meta">
                    <perch:categories id="categories" set="blog" label="Categories" display-as="checkboxes" suppress="true">
                        <a href="archive.php?cat=<perch:category id="catSlug" type="slug" />" class="p-category">
                            <perch:category id="catTitle" type="text" />
                        </a>
                    </perch:categories>
                </p>
        </div><!-- .column -->
    </div><!-- .row -->
</article>

<perch:blog id="image" type="image" width="500" height="500" crop="true" suppress="true" quality="100"/>