Title: Error when activating plugin
Last modified: October 12, 2016

---

# Error when activating plugin

 *  [edwcar](https://wordpress.org/support/users/edwcar/)
 * (@edwcar)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-28/)
 * Official MailerLite Sign Up Forms
 * Plugin could not be activated because it triggered a fatal error.
 * Fatal error: Cannot redeclare class ML_Lists in /var/www/html/wp-content/plugins/
   official-mailerlite-sign-up-forms/libs/mailerlite_rest/ML_Lists.php on line 40

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [codeagency](https://wordpress.org/support/users/7grafix/)
 * (@7grafix)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-28/#post-8415605)
 * Are you also using the WooCommerce Advanced Newsletter (WAN) plugin?
    I’m having
   this issue too, and it’s because both plugins call/declare the same class.
 *  [codeagency](https://wordpress.org/support/users/7grafix/)
 * (@7grafix)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-28/#post-8415844)
 * OK, I found a solution thanks to MailerLite support.
    The problem is indeed double
   identical class names.
 * Follow these steps:
    1. Open class-integration-advance-newsletter.php in WAN 
   plugin 2. Try to comment out lines 38 and 42 (see below) where MailerLite classes
   are included: include_once( ‘api/class-mailerlite-list.php’ ); include_once( ‘
   api/class-mailerlite-subscribe.php’ );

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Error when activating plugin’ is closed to new replies.

 * ![](https://ps.w.org/official-mailerlite-sign-up-forms/assets/icon-256x256.png?
   rev=3083205)
 * [MailerLite - Signup forms (official)](https://wordpress.org/plugins/official-mailerlite-sign-up-forms/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/official-mailerlite-sign-up-forms/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/official-mailerlite-sign-up-forms/)
 * [Active Topics](https://wordpress.org/support/plugin/official-mailerlite-sign-up-forms/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/official-mailerlite-sign-up-forms/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/official-mailerlite-sign-up-forms/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [codeagency](https://wordpress.org/support/users/7grafix/)
 * Last activity: [9 years, 7 months ago](https://wordpress.org/support/topic/error-when-activating-plugin-28/#post-8415844)
 * Status: not resolved