Title: HTTP ERROR 500
Last modified: February 13, 2017

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# HTTP ERROR 500

 *  Resolved [mariogroleau](https://wordpress.org/support/users/mariogroleau/)
 * (@mariogroleau)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/http-error-500-18/)
 * Hi
    I update to version 5.0.5, update worked correctly but I am unable to activate
   the extension, I receive the HTTP Error 500
    -  This topic was modified 9 years, 3 months ago by [mariogroleau](https://wordpress.org/support/users/mariogroleau/).

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [mariogroleau](https://wordpress.org/support/users/mariogroleau/)
 * (@mariogroleau)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/http-error-500-18/#post-8801247)
 * I disactivate all the plugin of my web site and I found that Nextgen public uploader
   is the plugin that cause the 500 error when I activate the Photo contest plugin
 *  Plugin Author [Wasiliy Strecker / ContestGallery developer](https://wordpress.org/support/users/contest-gallery/)
 * (@contest-gallery)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/http-error-500-18/#post-8802161)
 * Hi Mario,
 * thank you for this note. It’s a general problem of NextGEN Uploader. You can’t
   activate any other plugin because NextGEN Uploader calls a class which not exists.
   It seems also that the plugin is out of life time:
    [https://wordpress.org/support/plugin/nextgen-public-uploader](https://wordpress.org/support/plugin/nextgen-public-uploader)
 *  Plugin Author [Wasiliy Strecker / ContestGallery developer](https://wordpress.org/support/users/contest-gallery/)
 * (@contest-gallery)
 * [9 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-18/#post-8984381)
 * RESOLVED

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘HTTP ERROR 500’ is closed to new replies.

 * ![](https://ps.w.org/contest-gallery/assets/icon-128x128.png?rev=3510934)
 * [Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe](https://wordpress.org/plugins/contest-gallery/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/contest-gallery/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/contest-gallery/)
 * [Active Topics](https://wordpress.org/support/plugin/contest-gallery/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/contest-gallery/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/contest-gallery/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [Wasiliy Strecker / ContestGallery developer](https://wordpress.org/support/users/contest-gallery/)
 * Last activity: [9 years, 1 month ago](https://wordpress.org/support/topic/http-error-500-18/#post-8984381)
 * Status: resolved