Title: Error/Conflict with Invoice Plugin
Last modified: September 1, 2016

---

# Error/Conflict with Invoice Plugin

 *  Resolved [triptservices](https://wordpress.org/support/users/triptservices/)
 * (@triptservices)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/errorconflict-with-invoice-plugin/)
 * I don’t ever recall installing this Event plugin. (I have the Avada theme; maybe
   it came with that?) In any case, I don’t use it for this web site. However, it
   appears to be causing problems even after uninstalling it.
 * I recently installed Sprout Invoices to handle billing our clients for services
   rendered. Everything works fine until you attempt to process a credit card and
   then you get a large block of error messages as follows:
 * `Class not loaded: WooCommerceClass not loaded: WooCommerceClass not loaded: 
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: WooCommerceClass not loaded: WooCommerceClass not loaded: WooCommerceClass
   not loaded: WooCommerceClass not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass
   not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded:
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded:
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded:
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded:
   Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded: WooCommerceClass
   not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded:
   Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass
   not loaded: WooCommerceClass not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass
   not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded:
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded:
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded:
   WooCommerceClass not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass
   not loaded: Tribe__Events__Pro__MainClass not loaded: WooCommerceClass not loaded:
   Tribe__Events__Pro__MainClass not loaded: WooCommerce`
 * I’ve contacted WooCommerce since their application is listed there as well, but
   they haven’t responded in 48 hours.
 * Any help would be appreciated.
 * [https://wordpress.org/plugins/the-events-calendar/](https://wordpress.org/plugins/the-events-calendar/)

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

 *  [Geoff Graham](https://wordpress.org/support/users/geoffgraham/)
 * (@geoffgraham)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/errorconflict-with-invoice-plugin/#post-7550396)
 * Hi [@triptservices](https://wordpress.org/support/users/triptservices/),
 * Sorry for the trouble here! I do believe that Avada packages The Events Calendar
   in the theme, so that would make sense why you’re seeing it in there.
 * Do you happen to also have another plugin called either WooCommerce Tickets or
   Event Tickets Plus? I want to confirm that because it looks like those errors
   are related to those plugins and will need to be deactivated (or updated to their
   latest versions) to clear out the errors.
 * Thanks!
    Geoff
 *  Thread Starter [triptservices](https://wordpress.org/support/users/triptservices/)
 * (@triptservices)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/errorconflict-with-invoice-plugin/#post-7550398)
 * I have uninstalled WooCommerce, The Events Calendar, and bbPress; all three are
   packaged with the Avada theme.
 * Would the Events Calendar have any interactions with the Authorize.net SDK, by
   chance? The error is being echoed by a PHP file provided by the Authorize.Net
   SDK.
 *  [Geoff Graham](https://wordpress.org/support/users/geoffgraham/)
 * (@geoffgraham)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/errorconflict-with-invoice-plugin/#post-7550420)
 * > Would the Events Calendar have any interactions with the Authorize.net SDK,
   > by chance? The error is being echoed by a PHP file provided by the Authorize.
   > Net SDK.
 * Definitely not, though I know WooCommerce would interact with Authorize.net if
   the settings are configured to do so and the plugin is activated or installed.

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

The topic ‘Error/Conflict with Invoice Plugin’ is closed to new replies.

 * ![](https://ps.w.org/the-events-calendar/assets/icon-256x256.gif?rev=2516440)
 * [The Events Calendar](https://wordpress.org/plugins/the-events-calendar/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/the-events-calendar/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/the-events-calendar/)
 * [Active Topics](https://wordpress.org/support/plugin/the-events-calendar/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/the-events-calendar/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/the-events-calendar/reviews/)

## Tags

 * [sprout](https://wordpress.org/support/topic-tag/sprout/)

 * 3 replies
 * 2 participants
 * Last reply from: [Geoff Graham](https://wordpress.org/support/users/geoffgraham/)
 * Last activity: [9 years, 10 months ago](https://wordpress.org/support/topic/errorconflict-with-invoice-plugin/#post-7550420)
 * Status: resolved