Trouble with file upload in a group

I'm having trouble using file upload in a group

My group meta is as follows:

  array(
                    'name'   => 'Right Hand Side Highlights', // Optional
                    'id'     => 'overview_rhs_highlights',
                    'type'   => 'group',
                    'clone'  => true,
                    'sort_clone' => true,
                    // List of sub-fields
                    'fields' => array(
                        array(
                            'name' => 'Title',
                            'id'   => 'overview_rhs_highlights_title',
                            'type' => 'text',
                        ),
                        array(
                            'name' => 'Text',
                            'id'   => 'overview_rhs_highlights_text',
                            'type' => 'textarea',
                        ),
                        array(
                              'name'             => 'Icon Upload',
                              'id'               => 'overview_rhs_highlights_image',
                              'type'             => 'file',
                              'force_delete'     => true,
                              'max_file_uploads' => 1,
                          ),
                        // Other sub-fields here
                    ),
                ),

Which is creating the metaboxes on the front end.

However, when I upload a file, in this case and svg which is used as an icon, it looks like this in the DB:

a:2:{i:0;a:3:{s:29:"overview_rhs_highlights_title";s:5:"POWER";s:28:"overview_rhs_highlights_text";s:164:"The Rhoda AT comes with electric motor powered by our battery pack. With five levels of assist and the amazing cruise mode you’ll be sure to find your sweet spot.";s:36:"_index_overview_rhs_highlights_image";s:19:"_file_60ca3874b54af";}i:1;a:3:{s:29:"overview_rhs_highlights_title";s:5:"Range";s:28:"overview_rhs_highlights_text";s:105:"With more than enough range for your daily commute the Rhoda AT is the ideal way to get to and from work.";s:36:"_index_overview_rhs_highlights_image";s:19:"_file_60ca3874b575d";}}

It seems to have added '_index' to the ID

This is my current front end code, which I'm attempting to adopt from the examples in the documentation:

<?php
          $highlights = rwmb_meta( 'overview_rhs_highlights' );
                  if ( ! empty( $highlights ) ) {
                      foreach ( $highlights as $highlight ) {
                          echo '<div class="contact">';
                          echo '<h4>', 'Contact info', '</h4>';
                          echo '<p><label>', 'Name:', '<label> ', $highlight['overview_rhs_highlights_title'], '</p>';
                          echo '<p><label>', 'Email:', '<label> ', $highlight['overview_rhs_highlights_text'], '</p>';
                          $files = $highlight['index_overview_rhs_highlights_image'];
                          echo $files;
                            foreach ( $files as $file ) {
                                ?>
                                <a href="<?php echo $file['url']; ?>"><?php echo $file['name']; ?></a>
                                <?php
                            }
                          echo '</div>';
                      }
                  }
                ?>

The First fields are outputting fine, but I get nothing from the file upload.