Good, but have mistakes with WordPress Multisite

I tried it on one my Multisite WP installation and have this mistake, when I go by a plugin’s link:

Fatal error: Uncaught Exception in /home/user/www/sitedir/wp-content/plugins/wp-affiliate-links/models/model/record.php:78 Stack trace: #0 /home/user/www/sitedir/wp-content/plugins/wp-affiliate-links/models/stat/record.php(18): WPAL_Model_Record->insert() #1 /home/user/www/sitedir/wp-content/plugins/wp-affiliate-links/models/destination/record.php(139): WPAL_Stat_Record->insert() #2 /home/user/www/sitedir/wp-content/plugins/wp-affiliate-links/actions/wp_loaded.php(64): WPAL_Destination_Record->redirect(‘META_REFRESH’) #3 /home/user/www/sitedir/wp-includes/class-wp-hook.php(286): wpal_wp_loaded(”) #4 /home/user/www/sitedir/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #5 /home/user/www/sitedir/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #6 /home/user/www/sitedir/wp-settings.php(546): do_action(‘wp_loaded’) #7 /home/user/www/sitedir/wp-config.php(101): require_once(‘/home/user/ww…’) #8 /home/user/www/sitedir/wp-load.php(37): require_once(‘/hom in /home/user/www/sitedir/wp-content/plugins/wp-affiliate-links/models/model/record.php on line 78
На сайте возникли временные проблемы технического характера.