[Plugin: Job Manager] Having an out invalid argument issue

Hi All,

I am unable to add categories to the admin settings. I’ve found this great plug in for a job board. It looks awesome, but when I try to add a new category under the Admin Settings> categories. When I click “update settings” I am greeted by an error message that reads:

“Warning: Invalid argument supplied for foreach() in /home/content/m/a/r/marvinhawkins/html/wp-content/plugins/job-manager/admin-settings.php on line 610”

Upon inspection of this line of code, I found this:
foreach( $_REQUEST['id'] as $id )

I have not edited the code at all, and this is the out of the box solution. What am I doing wrong?