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Internal Zend Error

Posted: October 18, 2012 at 12:43 pm


October 18, 2012 at 12:43 pm


I am getting an error on my site, and I’m unable to access my wp-admin pages. It only show a blank page. It only started happening today.

Error logs show this:

“Internal Zend error – Missing class information for in /var/www/html/wp-content/plugins/event-espresso/class/pue/pue-client.php on line 41”

I have a local install of the site on my computer (I use MAMP) and deploy to a development version, but the license key seems to be assigned to my local install. Is this what is causing the problem? Any ideas with how I can resolve this?



  • Support Staff

October 18, 2012 at 1:00 pm

Hi Ginger,

I can’t say for sure whether that is causing the issue. What I would do to trouble shoot this is turn wp-debug (in wp-config.php) on to see if there’s an error message displayed on the blank screen when trying to access the admin. Then also automatically deactivating all the plugins by renaming the wp-content/plugins folder. Then you can re-activate plugins one by one.

If it is an issue with the plugin updater, you can set this to false by changing the following line from espresso.php:

$espresso_check_for_updates = true;

Please let us know what you find and if the issue is from the plugin update engine, I’ll create a ticket for the developer to look into it.


October 18, 2012 at 1:14 pm

Ah, yes, I set $espresso_check_for_updates to false and I’m now able to get into my wp-admin.



  • Support Staff

October 18, 2012 at 2:12 pm

Thanks for letting us know.

This may be a problem with this specific server setup (incidentally this will sometimes happen with the WP -super cache plugin as well). One of the developers looked into this and found these docs:

and the php bug report

Here is a possible solution you could try: On line 31 in /event-espresso/class/pue/pue-client.php where it says:

if ( !class_exists('PluginUpdateEngineChecker') ):

you could try to replace it with

if ( !class_exists('PluginUpdateEngineChecker', false) ) : 

Then reenable the checking that’s been disabled and please let us know if that fixes it, if it doesn’t, there’s not much what can do about this.

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