Title: Fatal error: Uncaught Error: Class ‘underDEV_Requirements’ Last modified: August 10, 2017 --- # Fatal error: Uncaught Error: Class ‘underDEV_Requirements’ * Resolved [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/) * Hello. When this plugin is enabled this error occurs when using WP CLI ([http://wp-cli.org/](http://wp-cli.org/)). * > Fatal error: Uncaught Error: Class ‘underDEV_Requirements’ not found in \wp- > content\plugins\advanced-cron-manager\advanced-cron-manager.php:21 Viewing 15 replies - 1 through 15 (of 15 total) * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9397941) * Hi, any particular command of wp cli is failing like this? * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9398101) * At least: wp plugin list wp plugin activate wp plugin deactivate * I’m sure there are more of them. * If I use –skip-plugins=advanced-cron-manager it works normal. * I tried with usual installation and via wpackagist.org. * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401240) * Ok, I checked this and I assume you had installed the plugin directly via GitHub or wpackagist as you said. This will give you an error, because I’m not storing the vendor directory on Git repository. After downloading it’s required to run` composer install` to install all the dependencies. * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401298) * No, I have vendor dir in plugin directory like in this archive: [https://downloads.wordpress.org/plugin/advanced-cron-manager.2.2.3.zip](https://downloads.wordpress.org/plugin/advanced-cron-manager.2.2.3.zip) * > I tried with usual installation and via wpackagist.org. wpackagist.org contains all needed files when it installs plugin. [https://image.ibb.co/bYmXWa/Screenshot_1.png](https://image.ibb.co/bYmXWa/Screenshot_1.png) * It’s definitely something with WP CLI combination because plugin works normal via web UI. * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401330) * Hmm, that’s weird then. Error * > Class ‘underDEV_Requirements’ not found * points the finger at autoloader. I’m using classmap Composer feature there, maybe that’s not supported? * Or! What PHP version are you running? Any not usual setup? * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401364) * Composer works fine. * Did you try replicate this? * PHP 7.0.4 * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401433) * Yes, works like a charm here. * All I could find regarding similar errors is to upgrade WP-CLI, can you please do that? * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401475) * Already have latest (1.3.0). I found something: maybe it’s related to relative paths and wrong autoload.php including. If I change line 19 of advanced-cron- manager.php file to: require_once( __DIR__ . ‘/vendor/autoload.php’ ); it works ok. * I think it loads wrong autoload.php file because you’re using relative paths and I use Composer for whole project. Maybe it loads my /vendor/autoload.php ( which doesn’t have underDEV_Requirements class) * Can you make this change please? * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401484) * Makes sense! I’ll update, you can leave the core edited for now. * Thanks a ton for help with debugging. * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9401512) * Thanks. Will wait for new release 🙂 * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9406380) * Hey, fixed in 2.3.0 🙂 * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9406468) * Thanks, will try) * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9407650) * Yep, it works now, thanks! * Plugin Author [Kuba Mikita](https://wordpress.org/support/users/kubitomakita/) * (@kubitomakita) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9407756) * Awesome! Please, would you mind to [rate the plugin](https://wordpress.org/support/plugin/advanced-cron-manager/reviews/#new-post) if it helped you? * Thread Starter [v_decadence](https://wordpress.org/support/users/v_decadence/) * (@v_decadence) * [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9407766) * Done Viewing 15 replies - 1 through 15 (of 15 total) The topic ‘Fatal error: Uncaught Error: Class ‘underDEV_Requirements’’ is closed to new replies. * ![](https://ps.w.org/advanced-cron-manager/assets/icon.svg?rev=3096140) * [Advanced Cron Manager - debug & control](https://wordpress.org/plugins/advanced-cron-manager/) * [Frequently Asked Questions](https://wordpress.org/plugins/advanced-cron-manager/#faq) * [Support Threads](https://wordpress.org/support/plugin/advanced-cron-manager/) * [Active Topics](https://wordpress.org/support/plugin/advanced-cron-manager/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/advanced-cron-manager/unresolved/) * [Reviews](https://wordpress.org/support/plugin/advanced-cron-manager/reviews/) * 15 replies * 2 participants * Last reply from: [v_decadence](https://wordpress.org/support/users/v_decadence/) * Last activity: [8 years, 10 months ago](https://wordpress.org/support/topic/fatal-error-uncaught-error-class-underdev_requirements/#post-9407766) * Status: resolved