Getting ‘Filesystem: Not writeable’ error in version 2.5

First off, thanks for developing and maintaining this terrific plugin. I’ve been using it for years, and it makes a huge difference on our sites.

I have an issue with version 2.5 by which I’m a little confused. When I look in the plugin’s settings, I see that it says Filesystem: Not writeable. This wasn’t happening prior to 2.5. Fortunately, this change doesn’t actually stop the plugin from working, but it does prevent the Disable Object Cache button from working.

I can see from the changelog that the system is trying to write two files: object-cache.php and object-cache.tmp. If I look on the server, I can see that object-cache.php is there, and, moreover, that it’s being written by the latest version of the plugin. I know this, because, at the top of the object-cache.php file, it confirms that it’s version 2.5:

<?php
/**
 * Plugin Name: Redis Object Cache Drop-In
 * Plugin URI: https://projectdmc.org/plugins/redis-cache/
 * Description: A persistent object cache backend powered by Redis. Supports Predis, PhpRedis, Relay, replication, sentinels, clustering and WP-CLI.
 * Version: 2.5.0
 * Author: Till Krüss
 * Author URI: https://objectcache.pro
 * License: GPLv3
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 * Requires PHP: 7.2

Nevertheless, the plugin seems unable to write the other file (object-cache.tmp, and, thus, it concludes that the filesystem is Not writeable. I’m unsure as to why this would be the case. Surely, if the plugin can write object-cache.php to the correct folder, it can also write the .tmp file? The permissions on the WP_CONTENT_DIR are 775.

I am using Trellis and Bedrock, and I’m enabling the plugin using wp-cli, so the file structure and setup of my WordPress install is a little different than the out-of-the-box version, but this has never mattered before.

Any thoughts or advice as to where I should look?

Thanks!

• This topic was modified 2 hours, 40 minutes ago by Charles.