Fatal error: Uncaught TypeError: Argument 3 passed to ConstantContact_Display::checkbox() must be of the type array, string given, called in /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display.php on line 835 and defined in /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display.php:1260 Stack trace: #0 /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display.php(835): ConstantContact_Display->checkbox() #1 /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display.php(562): ConstantContact_Display->field() #2 /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display.php(407): ConstantContact_Display->build_form_fields() #3 /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display-shortcode.php(111): ConstantContact_Display->form() #4 /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins in /opt/lampp/htdocs/dswp/httpdocs/wp-content/plugins/constant-contact-forms/includes/class-display.php on line 1260