Title: “Constant already defined” error
Last modified: August 28, 2023

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# “Constant already defined” error

 *  Resolved [kauef89](https://wordpress.org/support/users/kauef89/)
 * (@kauef89)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/constant-already-defined-error/)
 * Plugin could not be activated because it triggered a **fatal error**.
 * **Warning**: Constant IT_STRIPE_EXPRESS_DIR already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **20**
 * **Warning**: Constant IT_STRIPE_EXPRESS_URL already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **21**
 * **Warning**: Constant IT_STRIPE_EXPRESS_INC already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **22**
 * **Warning**: Constant IT_STRIPE_EXPRESS_VERSION already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **23**
 * **Warning**: Constant IT_STRIPE_EXPRESS_FILE already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **24**
 * **Warning**: Constant IT_STRIPE_EXPRESS_NAME already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **25**
 * **Warning**: Constant IT_STRIPE_EXPRESS_REST_API already defined in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   stripe-express.php** on line **26**
 * **Warning**: Constant IT_STRIPE_EXPRESS_LOG_FOLDER already defined in **/home/
   storage/2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-
   premium/stripe-express.php** on line **27**
 * **Fatal error**: Cannot redeclare composerRequirecc7bf9777eacd36364c74521a35c5815()(
   previously declared in /home/storage/2/73/ae/lojaespacoalto1/public_html/wp-content/
   plugins/wp-stripe-express/vendor/composer/autoload_real.php:68) in **/home/storage/
   2/73/ae/lojaespacoalto1/public_html/wp-content/plugins/wp-stripe-express-premium/
   vendor/composer/autoload_real.php** on line **68**

Viewing 1 replies (of 1 total)

 *  Plugin Author [itstripe](https://wordpress.org/support/users/itstripe/)
 * (@itstripe)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/constant-already-defined-error/#post-17016074)
 * Hey,
 * Thank you for reporting this upgrade issue – we really appreciate you taking 
   the time to bring it to our attention.
 * After investigating, we found the problem was caused by a conflict between the
   free and premium versions of our plugin. We’ve resolved this in the latest update
   that was just released. Please try it and let us know if you have any further
   questions.
 * Sorry again for this upgrade trouble for you.
 * Best,
 * Troy

Viewing 1 replies (of 1 total)

The topic ‘“Constant already defined” error’ is closed to new replies.

 * ![](https://ps.w.org/wp-stripe-express/assets/icon-256x256.png?rev=3230233)
 * [Express Payment For Stripe](https://wordpress.org/plugins/wp-stripe-express/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-stripe-express/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-stripe-express/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-stripe-express/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-stripe-express/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-stripe-express/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [itstripe](https://wordpress.org/support/users/itstripe/)
 * Last activity: [2 years, 9 months ago](https://wordpress.org/support/topic/constant-already-defined-error/#post-17016074)
 * Status: resolved