Error message

• Notice: Undefined index: href in lang_dropdown_form() (line 169 of /home/comuadmin/domains/comunycarse.com/public_html/sites/all/modules/lang_dropdown/lang_dropdown.module).
• Notice: Undefined variable: selected_option in lang_dropdown_form() (line 197 of /home/comuadmin/domains/comunycarse.com/public_html/sites/all/modules/lang_dropdown/lang_dropdown.module).