No validation error message displayed

<%=form_with(model:@circle,local:true)do|f|%>
      <%=render'shared/circle_error'%>
      <%=f.label: name %>
      <%=f.text_field:name,class:'form-control'%>
      <%=f.label: Qualifications %>
      <%=f.text_field:qualification, class:'form-
      <%=f.submit "create", class: "btn btn-warning" %>
    <%end%>

def new
    @circle=Circle.new
  end
  
  def create
      @circle=Circle.new(circle_params)
      @circle.owner=current_user
  If @circle.save!
      @circle_user=CircleUser.new(circle_id:@circle.id, user_id:current_user.id)
      @circle_user.save!
      flash[:success] = "Created"
      redirect_to root_url
  else
      render 'new'
  end
  end
  
  def show
    @circle=Circle.find (params[:id])
    @apply=Apply.find_by(@apply)
    @circle_user=CircleUser.find_by (circle:@circle, user:current_user)
  end
  
  default
     @circle=Circle.find (params[:id])
  end
  
  default update
    @circle=Circle.find (params[:id])
    [email protected](circle_params)
      flash[:success] = "Circle information updated"
      redirect_to@circle
    else
      render 'edit'
    end
  end

<%[email protected] y?%>
  <divid="error_explanation">
    <div class="alert alert-danger">
      The input error is <%=pluralize(@circle.errors.count, "There were cases")%>.
    </div>
    <ul>
    <%@circle.errors.full_messages.each do|msg|%>
      <li><%=msg%></li>
    <%end%>
    </ul>
  </div>
<%end%>