Perch Gallery no images

Hi, I cannot get the gallery app to output images on the client's server. It works locally. I have the following image list template:

<perch:before>
    <h2><perch:gallery id="albumTitle" /></h2>
    <p><perch:gallery id="description" html="true" /></p>

    <ol>
</perch:before>
        <li class="fancybox">
            <a href="<perch:gallery id="main" />" class="gallery" title="<perch:gallery id="imageAlt" />" rel="album<perch:gallery id="albumID" />">
                <img src="<perch:gallery id="small" />" width="<perch:gallery id="small-w" />" height="<perch:gallery id="small-h" />" alt="<perch:gallery id="imageAlt" />" />
                <h5><perch:gallery id="imageAlt" type="textarea" maxlength="5" /></h5>
            </a>
        </li>
<perch:after>
    </ol>
</perch:after>

Other image processing is working. Is this a server issue?

Diagnostics

Perch: 2.8.31
Production mode: Production (100)
Installed apps: content (2.8.31), assets (2.8.31), categories (2.8.31), perch_forms (1.8.3), perch_gallery (2.8.6), perch_backup (1.2)
DB driver: PDO
DB tables: perch2_categories (0), perch2_category_counts (0), perch2_category_sets (0), perch2_content_index (155), perch2_content_items (57), perch2_content_regions (19), perch2_forms (1), perch2_forms_responses (1), perch2_gallery_albums (1), perch2_gallery_image_versions (15), perch2_gallery_images (5), perch2_navigation (0), perch2_navigation_pages (0), perch2_page_templates (3), perch2_pages (20), perch2_resource_log (73), perch2_resource_tags (0), perch2_resources (12), perch2_resources_to_tags (0), perch2_settings (12), perch2_user_passwords (1), perch2_user_privileges (33), perch2_user_role_privileges (16), perch2_user_roles (2), perch2_users (2)
Users: 2
App runtimes:
<?php
    $apps_list = array(
        'content', 
        'categories',
        'perch_gallery',    
        'perch_forms',              
    );
Editor plug-ins: markitup, redactor
H1: ceaf9664687b613cc76ede29c7406762
L1: 9915554332bcefccb5424c7b637b720b
F1: 2edba60ed1f613d6dd804feb202456a2
headerColour: #ffffff
content_singlePageEdit: 1
helpURL:
siteURL: /
hideBranding: 0
content_collapseList: 1
lang: en-gb
update_2.8.31: done
latest_version: 2.8.15
on_sale_version: 2.8.31
perch_gallery_update: 2.8.5
PERCH_DEVELOPMENT: 10
PERCH_STAGING: 50
PERCH_PRODUCTION: 100
PERCH_DB_USERNAME: droitw_db_user
PERCH_DB_SERVER: localhost
PERCH_DB_DATABASE: perch_
PERCH_DB_PREFIX: perch2_
PERCH_TZ: UTC
PERCH_EMAIL_FROM: james@beyondvisual.co.uk
PERCH_EMAIL_FROM_NAME: James Curran
PERCH_LOGINPATH: /cms
PERCH_PATH: /var/www/vhosts/historicdroitwich.org.uk/httpdocs/cms
PERCH_CORE: /var/www/vhosts/historicdroitwich.org.uk/httpdocs/cms/core
PERCH_RESFILEPATH: /var/www/vhosts/historicdroitwich.org.uk/httpdocs/cms/resources
PERCH_RESPATH: /cms/resources
PERCH_HTML5: 1
PERCH_RUNWAY:
PERCH_ERROR_MODE: DIE
PERCH_DATE_LONG: %d %B %Y
PERCH_DATE_SHORT: %d %b %Y
PERCH_TIME_SHORT: %H:%M
PERCH_TIME_LONG: %H:%M:%S
PERCH_RUNWAY_ROUTED:
PERCH_STRONG_PASSWORDS:
PERCH_DEBUG:
PERCH_PREVIEW_ARG: preview
PERCH_TEMPLATE_PATH: /var/www/vhosts/historicdroitwich.org.uk/httpdocs/cms/templates
PERCH_DEFAULT_DOC: index.php
PERCH_DEFAULT_EXT: .php
PERCH_PRODUCTION_MODE: 100
PERCH_RWD:
PERCH_HTML_ENTITIES:
PERCH_SSL:
PERCH_STRIPSLASHES:
PERCH_PROGRESSIVE_FLUSH: 1
PERCH_PARANOID:
PERCH_FORCE_SECURE_COOKIES:
PERCH_PASSWORD_MIN_LENGTH: 6
PERCH_MAX_FAILED_LOGINS: 10
PERCH_AUTH_LOCKOUT_DURATION: 1 HOUR
PERCH_VERIFY_UPLOADS:
PERCH_AUTH_PLUGIN:
PERCH_DB_CHARSET: utf8
PERCH_DB_PORT:
PERCH_DB_SOCKET:
PERCH_SESSION_TIMEOUT_MINS: 20
HOSTING SETTINGS

PHP: 5.3.3
Zend: 2.3.0
OS: Linux
SAPI: apache2handler
Safe mode: not detected
MySQL client: 5.0.95
MySQL server: 5.0.95-log
Free disk space: 311.08 GB
Extensions: Core, date, ereg, libxml, openssl, pcre, zlib, bz2, calendar, ctype, hash, filter, ftp, gettext, gmp, session, iconv, Reflection, standard, shmop, SPL, SimpleXML, sockets, exif, tokenizer, xml, apache2handler, curl, dom, fileinfo, gd, imap, json, mbstring, mcrypt, mysql, mysqli, PDO, pdo_mysql, pdo_sqlite, Phar, SQLite, wddx, xmlreader, xmlwriter, xsl, zip, ionCube Loader
GD: Yes
ImageMagick: No
PHP max upload size: 128M
PHP max form post size: 50M
PHP memory limit: 512M
Total max uploadable file size: 50M
Resource folder writeable: Yes
Session timeout: 24 minutes
Native JSON: Yes
Filter functions: Yes
Transliteration functions: No
UNIQUE_ID: wCcbP9WlRikAAGM5DnAAAAAB
PP_CUSTOM_PHP_INI: /var/www/vhosts/system/historicdroitwich.org.uk/etc/php.ini
PP_CUSTOM_PHP_CGI_INDEX: module
HTTP_HOST: historicdroitwich.org.uk
HTTP_CONNECTION: keep-alive
HTTP_UPGRADE_INSECURE_REQUESTS: 1
HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36
HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_REFERER: https://historicdroitwich.org.uk/cms/core/settings/diagnostics/
HTTP_ACCEPT_ENCODING: gzip, deflate, sdch
HTTP_ACCEPT_LANGUAGE: en-US,en;q=0.8
HTTP_COOKIE: cmsa=1; PHPSESSID=s5h7kmlbsolvgrhdhcnjrdtq35
PATH: /sbin:/usr/sbin:/bin:/usr/bin
SERVER_SIGNATURE: <address>Apache Server at historicdroitwich.org.uk Port 80</address>
SERVER_SOFTWARE: Apache
SERVER_NAME: historicdroitwich.org.uk
SERVER_ADDR: 213.165.70.41
SERVER_PORT: 80
REMOTE_ADDR: 82.69.41.174
DOCUMENT_ROOT: /var/www/vhosts/historicdroitwich.org.uk/httpdocs
SERVER_ADMIN: webdev@designjazz.com
SCRIPT_FILENAME: /var/www/vhosts/historicdroitwich.org.uk/httpdocs/cms/core/settings/diagnostics/index.php
REMOTE_PORT: 62636
GATEWAY_INTERFACE: CGI/1.1
SERVER_PROTOCOL: HTTP/1.1
REQUEST_METHOD: GET
QUERY_STRING: extended
REQUEST_URI: /cms/core/settings/diagnostics/?extended
SCRIPT_NAME: /cms/core/settings/diagnostics/index.php
PHP_SELF: /cms/core/settings/diagnostics/index.php
REQUEST_TIME: 1472635840