Multiple sites down due to plugin update
An error of type E_ERROR was caused in line 85 of the file /home/sitename/public_html/wp-content/plugins/zero-spam/includes/class-autoloader.php. Error message: Uncaught Error: Call to undefined function ZeroSpam\array_key_last() in /home/sitename/public_html/wp-content/plugins/zero-spam/includes/class-autoloader.php:85 Stack trace: #0 /home/sitename/public_html/wp-content/plugins/zero-spam/includes/class-autoloader.php(118): ZeroSpam\Autoloader::load_class('Includes\\DB') #1 [internal function]: ZeroSpam\Autoloader::autoload('ZeroSpam\\Includ...') #2 /home/sitename/public_html/wp-content/plugins/zero-spam/includes/class-plugin.php(141): spl_autoload_call('ZeroSpam\\Includ...') #3 /home/sitename/public_html/wp-content/plugins/zero-spam/includes/class-plugin.php(117): ZeroSpam\Plugin->init_components() #4 /home/sitename/public_html/wp-includes/class-wp-hook.php(287): ZeroSpam\Plugin->init('') #5 /home/sitename/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #6 /home/sitename/public_html/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #7 /home/sitename/public_html/wp-settings.php(557): do_action('init') #8 /home/sitename/public_html/wp
