Sudden blank page on WordPress Admin Dashboard

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Sudden blank page on WordPress Admin Dashboard



My WordPress Admin Dashboard is experiencing an issue which I have never encountered before. I have not made any updates/changes on WordPress and any plugins. Yet, suddenly my WordPress Admin Dashboard has become like the attached image below. enter image description here



What I have tried so far to fix this issue:



(1) Increased the WP_MEMORY_LIMIT but it did not worked out



(2) Tried to change wp-adminincludesscreen.php on line 706:


wp-adminincludesscreen.php


from <?php echo self::$this->_help_sidebar; ?>
to <?php echo $this->_help_sidebar; ?>



But my screen.php file has less than 300 lines of code and does not contain <?php echo self::$this->_help_sidebar; ?> in it. So I cannot change it.


<?php echo self::$this->_help_sidebar; ?>



(3) Disabled all plugins(10) by renaming the "plugins" folder and it did solved the blank page issue.



(4) I have set WP_DEBUG to TRUE and got the following messages:


Undefined property: wpdb::$connect_errno in /local/www/html/xxxxx/wp-includes/wp-db.php on line 684 Notice: Undefined property: wpdb::$connect_errno in /local/www/html/xxxxx/wp-includes/wp-db.php on line 684 Notice: The called constructor method for WP_Widget in WPAC_Nav_Menu_Widget is deprecated since version 4.3.0! Use
__construct()
instead. in /local/www/html/xxxxx/wp-includes/functions.php on line 3764 Notice: The called constructor method for WP_Widget in Genesis_Featured_Post_with_title is deprecated since version 4.3.0! Use
__construct()
instead. in /local/www/html/xxxxx/wp-includes/functions.php on line 3764 Notice: Constant FORCE_SSL_ADMIN already defined in /local/www/html/xxxxx/wp-config.php 



(5) Disabled the plugins(10) one by one to find out which plugin was the culprit. Interesting enough is that whichever plugin I disabled the blank page issues was still solved . This made it difficult for me to isolate which plugin was the culprit. I might be totally wrong thinking that the plugins may be causing this blank page issues. Currently, I have no idea how to solve/approach this issue and why this is happening.



Any help would be appreciated very much!





Is your WP_DEBUG in wp-config.php set to true?
– Sheedo
Jan 10 at 3:34






@Sheedo Yes, I have. Please see point (4) in my updated question.
– ApplePie
Jan 10 at 3:45





Have you done anything to fix the error message that showed up?
– Sheedo
Jan 10 at 3:52





Its not whitepage/dead, as you wouldnt even see anything.. Have a look at your error logs, perhaps something died in view buffering.
– Lawrence Cherone
Jan 10 at 4:02





@Sheedo, it seems that there was an issue on the server side. I will update my solution soon on this question.
– ApplePie
Jan 10 at 16:43









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