Uncaught Error: Class 'WpMinions\Plugin' not found

[kish2011]

Uncaught Error: Class 'WpMinions\Plugin' not found

Getting these errors when I am trying to call wp_async_task_add this?

Fatal error: Uncaught Error: Class 'WpMinions\Plugin' not found in /Applications/MAMP/htdocs/woocommerce/wp-content/plugins/WP-Minions/wp-minions.php:30 Stack trace: #0 /Applications/MAMP/htdocs/woocommerce/wp-content/plugins/WP-Minions/wp-minions.php(64): wp_async_task_add('transition_post...', Array) #1 /Applications/MAMP/htdocs/woocommerce/wp-settings.php(362): include_once('/Applications/M...') #2 /Applications/MAMP/htdocs/woocommerce/wp-config.php(103): require_once('/Applications/M...') #3 /Applications/MAMP/htdocs/woocommerce/wp-load.php(37): require_once('/Applications/M...') #4 /Applications/MAMP/htdocs/woocommerce/wp-admin/admin.php(34): require_once('/Applications/M...') #5 /Applications/MAMP/htdocs/woocommerce/wp-admin/plugins.php(10): require_once('/Applications/M...') #6 {main} thrown in /Applications/MAMP/htdocs/woocommerce/wp-content/plugins/WP-Minions/wp-minions.php on line 30