Warning messages

I should appreciate your help to remove/solve the messages appeared on website:
1. Warning: implode(): Invalid arguments passed in /home3/ada5556/public_html/amarda/wp-content/plugins/cta/classes/class.widget.static.php on line 50

2. Warning: array_rand() expects parameter 1 to be array, string given in /home3/ada5556/public_html/amarda/wp-content/plugins/cta/classes/class.widget.static.php on line 52

http://www.http://makemoney.com.mx/amarda/

Thank you.

https://wordpress.org/plugins/magic-action-box/