Can't Fully Activate the Plugin

So after “activating” the plugin in wordpress I receive a couple of errors. First off, whenever I go to the widgets page, I am greeted by wall of text: PHP Warning: Invalid argument supplied for foreach() in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 50
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63
PHP Warning: in_array() [function.in-array]: Wrong datatype for second argument in C:\Inetpub\wwwroot\Rnetwp\wp-content\plugins\active-directory-employee-list\classes\class-active-directory-employee-list-widget.php on line 63

So, my widgets page is broken if I keep this plugin activated. Am I missing something?

https://www.ads-software.com/extend/plugins/active-directory-employee-list/