Fatal error: Uncaught Error: Call to undefined function get_user_by() in /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-includes/user.php:1984 Stack trace: #0 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-includes/version.php(112): username_exists('Adminroot') #1 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-content/plugins/updraftplus/class-updraftplus.php(903): include('/home1/jainneti...') #2 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-content/plugins/updraftplus/class-updraftplus.php(156): UpdraftPlus->get_wordpress_version() #3 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-content/plugins/updraftplus/updraftplus.php(232): UpdraftPlus->__construct() #4 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-settings.php(526): include_once('/home1/jainneti...') #5 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-config.php(89): require_once('/home1/jainneti...') #6 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-load.php(50): require_once('/home1/jainneti...') #7 /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-blog-header.php(13): require_once('/home1/jainneti...') #8 /home1/jainnetis/public_html/theinfusionearth/multivendor/index.php(17): require('/home1/jainneti...') #9 {main} thrown in /home1/jainnetis/public_html/theinfusionearth/multivendor/wp-includes/user.php on line 1984