Title: 3.4 Warning array error on line 537
Last modified: August 20, 2016

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# 3.4 Warning array error on line 537

 *  Resolved [AT Admin](https://wordpress.org/support/users/at-admin/)
 * (@at-admin)
 * [13 years, 10 months ago](https://wordpress.org/support/topic/34-warning-array-error-on-line-537/)
 * I apologize as I’m fairly new to WordPress. After I did the auto update on to
   3.4 all of my posts now contain this error at the very top:
 * Warning: array_key_exists() [function.array-key-exists]: The first argument should
   be either a string or an integer in /home/adventis/public_html/wp-includes/cache.
   php on line 537
 * What do I need to do to get rid of it? Do I revert back to an older version of
   WP? Is anyone else getting this? It only happened after my update. I’ve tried
   re-installing, but it doesn’t help.
 * Please help.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Moderator [Jan Dembowski](https://wordpress.org/support/users/jdembowski/)
 * (@jdembowski)
 * Forum Moderator and Brute Squad
 * [13 years, 10 months ago](https://wordpress.org/support/topic/34-warning-array-error-on-line-537/#post-2832506)
 * Give this a read, you can do the third step without access to the WordPress dashboard.
 * Have you tried:
 * – deactivating **all** plugins to see if this resolves the problem. If this works,
   re-activate the plugins one by one until you find the problematic plugin(s).
 * – switching to the Twenty Eleven theme to rule out any theme-specific problems.
 * – [resetting the plugins folder](http://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F)
   by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause
   problems.
 * – re-uploading the wp-admin and wp-includes folders from a **fresh** download
   of WordPress.
 * Also consider giving this a good read too.
 * [http://wordpress.org/support/topic/troubleshooting-wordpress-34-master-list?replies=4](http://wordpress.org/support/topic/troubleshooting-wordpress-34-master-list?replies=4)
 *  Thread Starter [AT Admin](https://wordpress.org/support/users/at-admin/)
 * (@at-admin)
 * [13 years, 10 months ago](https://wordpress.org/support/topic/34-warning-array-error-on-line-537/#post-2832524)
 * Thanks Jan D. I deactivated all the plugins and found that it was my “GTS Translation”
   plugin causing the issue. I’ve contacted them since I don’t know how to fix it.
   I do like that plugin, but for now it’s temporarily suspended.
 * Kudos and much thanks!

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘3.4 Warning array error on line 537’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [AT Admin](https://wordpress.org/support/users/at-admin/)
 * Last activity: [13 years, 10 months ago](https://wordpress.org/support/topic/34-warning-array-error-on-line-537/#post-2832524)
 * Status: resolved

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