laravel multiple image validation error print

                                  <div class="form-group">
                                  <label class="col-md-3 col-xs-12 control-label">Multiple Pic <span style="color:red"> *</span></label>
                                      <div class="col-md-7 col-xs-12">
                                          <div class="">
                                              <input name="filename[]" multiple type="file" value="{{ old('filename') }}" class="form-control" />
                                            {{--   <span style="color:red">{{  $errors->first('filename') }}</span> --}}

                                              @foreach($errors->all() as $error)
                                                        <span class="help-block" style="color:red"><strong>{{$error}}</strong></span>
                                              @endforeach
                                          </div>
                                      </div>
                                  </div>
                                  {{-- controller --}}
                                     $Upload_model = request()->validate([
            
          'filename' =>'required',
          'filename.*' => 'required|mimes:pdf,jpeg,png',
          //'filename' => 'required|mimes:jpg,bmp,png',
         
       ]);