Title: Fatal Error
Last modified: November 30, 2017

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# Fatal Error

 *  Resolved [daniel.vos](https://wordpress.org/support/users/danielvos/)
 * (@danielvos)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-2742/)
 * I’m getting a fatal error when I try to activate this plugin:
 * Fatal error: Cannot declare class WPOAuthUtil, because the name is already in
   use in /wp-content/plugins/wp-to-twitter/WP_OAuth.php on line 750
 * Any ideas what to do?

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [thomaswm](https://wordpress.org/support/users/thomaswm/)
 * (@thomaswm)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-2742/#post-9738406)
 * Are you maybe using the [Twitter Widget Pro](https://de.wordpress.org/plugins/twitter-widget-pro/)
   plugin? Its latest version seems to be incompatible with “WP to Twitter”.
 * I had this problem on one of my websites. It can be solved by deactivating any
   one of those plugins.
 *  Plugin Author [Joe Dolson](https://wordpress.org/support/users/joedolson/)
 * (@joedolson)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-2742/#post-9738484)
 * Are you trying to activate WP to Twitter? The error you’re receiving would only
   happen if you already have WP to Twitter activated, since it’s reporting a name
   collision **with** WP to Twitter, so I’m not sure exactly what’s going on here.
 *  Thread Starter [daniel.vos](https://wordpress.org/support/users/danielvos/)
 * (@danielvos)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-2742/#post-9757698)
 * Twitter Widget Pro is also installed. If I deactivate Twitter Widget Pro, I can
   activate WP to Twitter.
 *  Plugin Author [Joe Dolson](https://wordpress.org/support/users/joedolson/)
 * (@joedolson)
 * [8 years, 4 months ago](https://wordpress.org/support/topic/fatal-error-2742/#post-9761475)
 * Is there a specific reason you need both plugins?
 *  [gradient9](https://wordpress.org/support/users/gradient9/)
 * (@gradient9)
 * [8 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-2742/#post-10053291)
 * Same issue here as well. The two plugins aren’t able to co-exist.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Fatal Error’ is closed to new replies.

 * ![](https://ps.w.org/wp-to-twitter/assets/icon-256x256.png?rev=2997308)
 * [XPoster - Share to Bluesky and Mastodon](https://wordpress.org/plugins/wp-to-twitter/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-to-twitter/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-to-twitter/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-to-twitter/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-to-twitter/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-to-twitter/reviews/)

 * 5 replies
 * 4 participants
 * Last reply from: [gradient9](https://wordpress.org/support/users/gradient9/)
 * Last activity: [8 years, 1 month ago](https://wordpress.org/support/topic/fatal-error-2742/#post-10053291)
 * Status: resolved