Fatal error: Uncaught Error: Call to undefined function MailPoet\Migrator\mb_strimwidth() in /home/r1viera/public_html/wp-content/plugins/mailpoet/lib/Migrator/Migrator.php:90
Stack trace:
#0 /home/r1viera/public_html/wp-content/plugins/mailpoet/lib/Migrator/Migrator.php(38): MailPoet\Migrator\Migrator->getStatus()
#1 /home/r1viera/public_html/wp-content/plugins/mailpoet/lib/Config/Activator.php(78): MailPoet\Migrator\Migrator->run()
#2 /home/r1viera/public_html/wp-content/plugins/mailpoet/lib/Config/Activator.php(60): MailPoet\Config\Activator->processActivate()
#3 /home/r1viera/public_html/wp-content/plugins/mailpoet/lib/Config/Initializer.php(423): MailPoet\Config\Activator->activate()
#4 /home/r1viera/public_html/wp-includes/class-wp-hook.php(324): MailPoet\Config\Initializer->maybeRunActivator('')
#5 /home/r1viera/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#6 /home/r1viera/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#7 /home/r1viera/public_html/wp-settings.php(704): do_action('init')
#8 /home/r1viera/public_html/wp-config.php(97): require_once('/home/r1viera/p...')
#9 /home/r1viera/public_html/wp-load.php(50): require_once('/home/r1viera/p...')
#10 /home/r1viera/public_html/wp-blog-header.php(13): require_once('/home/r1viera/p...')
#11 /home/r1viera/public_html/index.php(17): require('/home/r1viera/p...')
#12 {main}
thrown in /home/r1viera/public_html/wp-content/plugins/mailpoet/lib/Migrator/Migrator.php on line 90