I have a multisite setup and am having issues with W3TC cache purging / clearing. When I click the “purge all caches” or “empty cache” buttons I get an error page in my browser with this message:
This page isn’t working
domain.com is currently unable to handle this request.
HTTP ERROR 500
The url slug for the page is this:
wp-admin/network/admin.php?page=w3tc_dashboard&w3tc_flush_all&_wpnonce=7020971e41
Here is some additional diagnostic info:
WordPress: 4.9.2 Multisite (subdomain)
Domain Mapping: Enabled
Web Server: Apache
PHP: 7.0.16
MySQL: 5.5.5
ext/mysqli: yes
PHP Memory Limit: 512M
WP Memory Limit: 100M
Memory Usage: 4 MB
Blocked External HTTP Requests: None
WP Locale: en_US
Organize uploads by month/year: Enabled
WP_DEBUG: No
WP_DEBUG_LOG: No
WP_DEBUG_DISPLAY: No
SCRIPT_DEBUG: No
WP Max Upload Size: 40 MB
PHP Time Limit: 120
PHP Error Log:
WP Cron: Enabled
fsockopen: Enabled
allow_url_fopen: Enabled
OpenSSL: OpenSSL 1.0.2k 26 Jan 2017
cURL: Enabled
Zlib Compression: Enabled
PHP GD: bundled (2.1.0 compatible)
Imagick: Disabled
Basic Auth: Disabled
Proxy: Disabled
Active Theme Name: Divi
Active Plugins:
Akismet Anti-Spam (v4.0.2) by Automattic
Amazon Web Services (v1.0.4) by Delicious Brains
Autoptimize (v2.3.2) by Frank Goossens (futtta)
Cloudflare (v3.3.2) by John Wineman, Furkan Yilmaz, Junade Ali (Cloudflare Team)
EWWW Image Optimizer (v4.0.6) by Shane Bishop
Google Analytics Multisite Async (v1.1) by Niklas Jonsson
Optimize Database after Deleting Revisions (v4.5.1) by CAGE Web Design | Rolf van Gelder, Eindhoven, The Netherlands
Really Simple SSL (v2.5.24) by Rogier Lankhorst
Remove Query Strings From Static Resources (v1.4) by Speed Up My Website, Your WP Expert
UpdraftPlus – Backup/Restore (v1.14.3) by UpdraftPlus.Com, DavidAnderson
W3 Total Cache (v0.9.6) by Frederick Townes
WDS Active Plugin Data (v1.0.1) by WebDevStudios
WP Offload S3 (v1.5.1) by Delicious Brains
WP Offload S3 – Assets Pull Addon (v1.0) by Delicious Brains
WordPress MU Domain Mapping (v0.5.5.1) by Donncha O Caoimh
Yoast SEO (v6.2) by Team Yoast
a3 Lazy Load (v1.8.3) by a3rev Software
Drop-ins:
advanced-cache.php – advanced-cache.php
db.php – db.php
install.php – install.php
object-cache.php – object-cache.php
sunrise.php – sunrise.php