When i use path metatags module i get Undefined index: #tag in path_metatags_html_head_alter() error.

When i use path metatags module i get

Notice:Undefined index: #tag in path_metatags_html_head_alter() (line 35 of /var/www/html/stg.onroad.com.au/sites/all/modules/path_metatags/path_metatags.module).

it only seen on user page. i attach a screenshot of the error page.
Please help me getting out from here.