Title: Fatal error during plugin activation
Last modified: October 12, 2021

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# Fatal error during plugin activation

 *  [sbova1985](https://wordpress.org/support/users/sbova1985/)
 * (@sbova1985)
 * [4 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-during-plugin-activation-4/)
 * While trying to activate this plugin on my WordPress(v5.4.2) site I’m getting
   the following fatal error.
 * Please install Advanced Custom Fields plugin first to use Fuel – Bitcentral plugin.
 * My site is running ACF Pro v5.9.9. Any idea what might be causing activation 
   to fail?

Viewing 1 replies (of 1 total)

 *  Thread Starter [sbova1985](https://wordpress.org/support/users/sbova1985/)
 * (@sbova1985)
 * [4 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-during-plugin-activation-4/#post-14963833)
 * This fatal error seems to be occurring because I have ACF installed as a mu-plugin.
   Your “is_plugin_active” check is always going to return false for mu-plugins.

Viewing 1 replies (of 1 total)

The topic ‘Fatal error during plugin activation’ is closed to new replies.

 * ![](https://ps.w.org/fuel-bitcentral/assets/icon-256x256.png?rev=3138455)
 * [ViewNexa - Bitcentral](https://wordpress.org/plugins/fuel-bitcentral/)
 * [Support Threads](https://wordpress.org/support/plugin/fuel-bitcentral/)
 * [Active Topics](https://wordpress.org/support/plugin/fuel-bitcentral/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/fuel-bitcentral/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/fuel-bitcentral/reviews/)

 * 1 reply
 * 1 participant
 * Last reply from: [sbova1985](https://wordpress.org/support/users/sbova1985/)
 * Last activity: [4 years, 9 months ago](https://wordpress.org/support/topic/fatal-error-during-plugin-activation-4/#post-14963833)
 * Status: not resolved