Fatal error: Uncaught Error: Call to undefined function RankMath\wp_rand() in /var/www/betatech.co/wp-content/plugins/seo-by-rank-math/includes/class-installer.php:638 Stack trace: #0 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math/includes/class-installer.php(140): RankMath\Installer->create_cron_jobs() #1 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math/includes/class-installer.php(50): RankMath\Installer->activate() #2 /var/www/betatech.co/wp-includes/class-wp-hook.php(324): RankMath\Installer->activation() #3 /var/www/betatech.co/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #4 /var/www/betatech.co/wp-includes/plugin.php(517): WP_Hook->do_action() #5 /var/www/betatech.co/wp-admin/includes/plugin.php(703): do_action() #6 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math-pro/rank-math-pro.php(493): activate_plugin() #7 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math-pro/rank-math-pro.php(147): RankMathPro->activate_free_version() #8 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math-pro/rank-math-pro.php(95): RankMathPro->are_requirements_met() #9 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math-pro/rank-math-pro.php(86): RankMathPro->__construct() #10 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math-pro/rank-math-pro.php(521): RankMathPro::get() #11 /var/www/betatech.co/wp-content/plugins/seo-by-rank-math-pro/rank-math-pro.php(525): rank_math_pro() #12 /var/www/betatech.co/wp-settings.php(545): include_once('...') #13 /var/www/betatech.co/wp-config.php(110): require_once('...') #14 /var/www/betatech.co/wp-load.php(50): require_once('...') #15 /var/www/betatech.co/wp-blog-header.php(13): require_once('...') #16 /var/www/betatech.co/index.php(17): require('...') #17 {main} thrown in /var/www/betatech.co/wp-content/plugins/seo-by-rank-math/includes/class-installer.php on line 638