Title: Error Message
Last modified: August 29, 2018

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# Error Message

 *  [lexclark](https://wordpress.org/support/users/lexclark/)
 * (@lexclark)
 * [7 years, 9 months ago](https://wordpress.org/support/topic/error-message-707/)
 * I’m getting this error post updating plugins on our site: Fatal error: Call to
   undefined function wp_doing_ajax() in /nfs/c03/h05/mnt/167954/domains/nwarollerderby.
   com/html/wp-content/plugins/wordpress-simple-paypal-shopping-cart/wp_shopping_cart.
   php on line 96
 * Warning: Cannot modify header information – headers already sent by (output started
   at /nfs/c03/h05/mnt/167954/domains/nwarollerderby.com/html/wp-content/plugins/
   wordpress-simple-paypal-shopping-cart/wp_shopping_cart.php:96) in /nfs/c03/h05/
   mnt/167954/domains/nwarollerderby.com/html/wp-content/plugins/stripe/includes/
   core/libraries/wp-session/class-wp-session.php on line 146
 * I’ve read other topics about possible bad code, but I receive the error when 
   trying to login to the admin site to troubleshoot.

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

 *  [Amit Singh](https://wordpress.org/support/users/apprimit/)
 * (@apprimit)
 * [7 years, 9 months ago](https://wordpress.org/support/topic/error-message-707/#post-10636695)
 * Hi,
 * Does your website is updated to the latest version of the WordPress?
 * 1- Update wordpress to the latest version
    2- Reactivate the plugin you are facing
   issue with (wordpress simple PayPal shopping cart) 3. Clear all cache
 * Now reload the site and check whether the issue still occurs or not?
    Hope it
   helps.
 * Regards
    Amit Singh
 *  Thread Starter [lexclark](https://wordpress.org/support/users/lexclark/)
 * (@lexclark)
 * [7 years, 9 months ago](https://wordpress.org/support/topic/error-message-707/#post-10636704)
 * It does need to be updated to the latest version – that was my next step. But
   how am I able to do that if I can’t login to the Admin tools?
 *  [Amit Singh](https://wordpress.org/support/users/apprimit/)
 * (@apprimit)
 * [7 years, 9 months ago](https://wordpress.org/support/topic/error-message-707/#post-10636869)
 * Login to your Cpanel. Explore file manager or login via FTP.
 * Navigate wp-content > plugins > find wordpress simple PayPal shopping cart plugin
   and delete this folder.
 * Now visit the site and log in to your admin area.
 * update the wordpress – please create a full backup before updating the wordpress(
   use updraft plus plugin to create a backup).
 * Install the plugin again and check whether the issue still persists or not?

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

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

## Tags

 * [WordPress Error](https://wordpress.org/support/topic-tag/wordpress-error/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 3 replies
 * 2 participants
 * Last reply from: [Amit Singh](https://wordpress.org/support/users/apprimit/)
 * Last activity: [7 years, 9 months ago](https://wordpress.org/support/topic/error-message-707/#post-10636869)
 * Status: not resolved

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