( ! ) Fatal error: Uncaught Error: Call to undefined function get_user_by() in /var/www/html/wp-includes/user.php on line 1984
( ! ) Error: Call to undefined function get_user_by() in /var/www/html/wp-includes/user.php on line 1984
Call Stack
#	Time	Memory	Function	Location
1	0.0013	354352	{main}( )	.../index.php:0
2	0.0013	354632	require( '/var/www/html/wp-blog-header.php' )	.../index.php:17
3	0.0014	355080	require_once( '/var/www/html/wp-load.php' )	.../wp-blog-header.php:13
4	0.0014	355896	require_once( '/var/www/html/wp-config.php' )	.../wp-load.php:50
5	0.0014	358464	require_once( '/var/www/html/wp-settings.php' )	.../wp-config.php:99
6	0.1838	3678864	include_once( '/var/www/html/wp-content/plugins/updraftplus/updraftplus.php' )	.../wp-settings.php:526
7	0.1840	3683136	UpdraftPlus->__construct( )	.../updraftplus.php:232
8	0.1861	3760472	UpdraftPlus->get_wordpress_version( )	.../class-updraftplus.php:156
9	0.1861	3761520	include( '/var/www/html/wp-includes/version.php' )	.../class-updraftplus.php:903
10	0.1862	3766888	username_exists( )	.../version.php:112