When Open Login page This Kind of Error Shown in odoo 14 version 

Template: website.submenu

t-else="" class="dropdown-menu" role="menu">
          t-foreach="submenu.child_id" t-as="submenu">
              t-call="website.submenu">
                  t-set="item_class" t-value="None"/>
                  t-set="link_class" t-value="'dropdown-item'"/>
              
          
      

not found any solutions for that please help me to fix this error