Title: Cannot activate WooCommerce plugin after plugin install
Last modified: August 22, 2016

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# Cannot activate WooCommerce plugin after plugin install

 *  [ftschumann](https://wordpress.org/support/users/ftschumann/)
 * (@ftschumann)
 * [11 years, 7 months ago](https://wordpress.org/support/topic/cannot-activate-woocommerce-plugin-after-plugin-install/)
 * I can install WooCommerce on my site without any issues, but when I try to activate
   it, I get:
 * > Plugin could not be activated because it triggered a fatal error.
   > Fatal error: Call to undefined method CSSMin::minify() in /home4/*********/
   > public_html/wp-content/plugins/woocommerce/includes/admin/wc-admin-functions.
   > php on line 194
 * ( Obviously, I’ve replaced the account name with *********** )
 * I once had it activate using WordPress 4.0 and it seemed to be OK, so I think
   this problem started with the 4.1 update. It sounds like a possible theme issue,
   but I don’t know where to start.
 * Any suggestions would be greatly appreciated.
 * Many thanks,
 * Florian
 * [https://wordpress.org/plugins/woocommerce/](https://wordpress.org/plugins/woocommerce/)

Viewing 1 replies (of 1 total)

 *  [wooassist](https://wordpress.org/support/users/wooassist/)
 * (@wooassist)
 * [11 years, 7 months ago](https://wordpress.org/support/topic/cannot-activate-woocommerce-plugin-after-plugin-install/#post-5619883)
 * Hi Florian,
 * You should try reverting your website first 4.0 and clone your website on a staging
   environment. Your staging site should have the same specifications as your live
   site. What PHP version are you using?
 * If the problem is for that class, maybe the copy of your WooCommerce is missing
   some files.
 * I have found a discussion related to this class before, you may want to check
   it out: [https://wordpress.org/support/topic/fatal-error-woocommerce?replies=6](https://wordpress.org/support/topic/fatal-error-woocommerce?replies=6)

Viewing 1 replies (of 1 total)

The topic ‘Cannot activate WooCommerce plugin after plugin install’ is closed to
new replies.

 * ![](https://ps.w.org/woocommerce/assets/icon.svg?rev=3640790)
 * [WooCommerce](https://wordpress.org/plugins/woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/woocommerce/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [wooassist](https://wordpress.org/support/users/wooassist/)
 * Last activity: [11 years, 7 months ago](https://wordpress.org/support/topic/cannot-activate-woocommerce-plugin-after-plugin-install/#post-5619883)
 * Status: not resolved