Title: Website error with this plugin Last modified: August 11, 2025 --- # Website error with this plugin * Resolved [kinvorb](https://wordpress.org/support/users/kinvorb/) * (@kinvorb) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/website-error-with-this-plugin/) * If I turn on the Elementor timeline widget plugin on my site it stops working and shows white screen and this issue: **Fatal error**: Uncaught Error: Call to undefined function is_plugin_active() in /data/5/c/5c9811d0-45e8-47fd-a97b- 6d53374f670e/v4kosmos.org/web/wp-content/plugins/timeline-widget-addon-for-elementor/ timeline-widget-addon-for-elementor.php:86 Stack trace: #0 /data/5/c/5c9811d0- 45e8-47fd-a97b-6d53374f670e/v4kosmos.org/web/wp-content/plugins/timeline-widget- addon-for-elementor/timeline-widget-addon-for-elementor.php(76): Timeline_Widget_Addon- >cpfm_load_file() #1 /data/5/c/5c9811d0-45e8-47fd-a97b-6d53374f670e/v4kosmos. org/web/wp-content/plugins/timeline-widget-addon-for-elementor/timeline-widget- addon-for-elementor.php(58): Timeline_Widget_Addon->__construct() #2 /data/5/ c/5c9811d0-45e8-47fd-a97b-6d53374f670e/v4kosmos.org/web/wp-content/plugins/timeline- widget-addon-for-elementor/timeline-widget-addon-for-elementor.php(261): Timeline_Widget_Addon:: get_instance() #3 /data/5/c/5c9811d0-45e8-47fd-a97b-6d53374f670e/v4kosmos.org/ web/wp-content/plugins/timeline-widget-addon-for-elementor/timeline-widget-addon- for-elementor.php(264): Timeline_Widget_Addon() #4 /data/5/c/5c9811d0-45e8-47fd- a97b-6d53374f670e/v4kosmos.org/web/wp-settings.php(517): include_once(‘/data/ 5/c/5c981…’) #5 /data/5/c/5c9811d0-45e8-47fd-a97b-6d53374f670e/v4kosmos.org/web/ wp-config.php(111): require_once(‘/data/5/c/5c981…’) #6 /data/5/c/5c9811d0-45e8- 47fd-a97b-6d53374f670e/v4kosmos.org/web/wp-load.php(50): require_once(‘/data/ 5/c/5c981…’) #7 /data/5/c/5c9811d0-45e8-47fd-a97b-6d53374f670e/v4kosmos.org/web/ wp-admin/admin.php(34): require_once(‘/data/5/c/5c981…’) #8 /data/5/c/5c9811d0- 45e8-47fd-a97b-6d53374f670e/v4kosmos.org/web/wp-admin/index.php(10): require_once(‘/ data/5/c/5c981…’) #9 {main} thrown in **/data/5/c/5c9811d0-45e8-47fd-a97b-6d53374f670e/ v4kosmos.org/web/wp-content/plugins/timeline-widget-addon-for-elementor/timeline- widget-addon-for-elementor.php** on line **86**Thanks in advance for helping. * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwebsite-error-with-this-plugin%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 4 replies - 1 through 4 (of 4 total) * Plugin Author [CoolHappy](https://wordpress.org/support/users/narinder-singh/) * (@narinder-singh) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/website-error-with-this-plugin/#post-18594379) * Hi [@kinvorb](https://wordpress.org/support/users/kinvorb/), * Sorry for the inconvenience caused by this error. It was due to a compatibility issue with PHP 7.4 and WordPress 6.7.2. The `is_plugin_active()` function was being called too early, which triggered the fatal error.We have improved the check and fixed this issue in **v1.6.10**. Please update your plugin to the latest version. * Please let me know if you are still facing any issue. We will be happy to help you. * Thank you, * Thread Starter [kinvorb](https://wordpress.org/support/users/kinvorb/) * (@kinvorb) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/website-error-with-this-plugin/#post-18594394) * Hi, thank you for your very quick response! * I have enabled auto-updates, so my plugin should be updated to the latest version. At least i couldn’t see any update button or notification. Nevertheless, the issue still runs on my website. * Thread Starter [kinvorb](https://wordpress.org/support/users/kinvorb/) * (@kinvorb) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/website-error-with-this-plugin/#post-18594400) * Oh, now i can see the update button! Sorry for misinformation, now it fully works 🙂 * Plugin Author [CoolHappy](https://wordpress.org/support/users/narinder-singh/) * (@narinder-singh) * [9 months, 3 weeks ago](https://wordpress.org/support/topic/website-error-with-this-plugin/#post-18595125) * Glad to hear that! Could you please share your valuable feedback on our plugin’s functionality and our support?Your feedback motivates us to provide even quicker support and improve the plugin further.Here is the link:- [https://wordpress.org/support/plugin/timeline-widget-addon-for-elementor/reviews/#new-post](https://wordpress.org/support/plugin/timeline-widget-addon-for-elementor/reviews/#new-post) * Thanks in advance! Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Website error with this plugin’ is closed to new replies. * ![](https://ps.w.org/timeline-widget-addon-for-elementor/assets/icon-256x256. gif?rev=3341380) * [Timeline Widget For Elementor (Elementor Timeline, Vertical & Horizontal Timeline)](https://wordpress.org/plugins/timeline-widget-addon-for-elementor/) * [Frequently Asked Questions](https://wordpress.org/plugins/timeline-widget-addon-for-elementor/#faq) * [Support Threads](https://wordpress.org/support/plugin/timeline-widget-addon-for-elementor/) * [Active Topics](https://wordpress.org/support/plugin/timeline-widget-addon-for-elementor/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/timeline-widget-addon-for-elementor/unresolved/) * [Reviews](https://wordpress.org/support/plugin/timeline-widget-addon-for-elementor/reviews/) * 4 replies * 2 participants * Last reply from: [CoolHappy](https://wordpress.org/support/users/narinder-singh/) * Last activity: [9 months, 3 weeks ago](https://wordpress.org/support/topic/website-error-with-this-plugin/#post-18595125) * Status: resolved