Hi I tried re installing wordpress and unfortunately it’s still there. I checked the file you mention and the ‘submit_button()’ function appears to be there but I’m not sure how it’s supposed to look. At the moment mentions of it are as follows:
function get_submit_button( $text = null, $type = 'primary large', $name = 'submit', $wrap = true, $other_attributes = null ) {
if ( ! is_array( $type ) )
$type = explode( ' ', $type );
$r .= get_submit_button( __( 'Delete' ), 'deletemeta small', "deletemeta[{$entry['meta_id']}]", false, array( 'data-wp-lists' => "delete:the-list:meta-{$entry['meta_id']}::_ajax_nonce=$delete_nonce" ) );
$r .= get_submit_button( __( 'Update' ), 'updatemeta small', "meta-{$entry['meta_id']}-submit", false, array( 'data-wp-lists' => "add:the-list:meta-{$entry['meta_id']}::_ajax_nonce-add-meta=$update_nonce" ) );
<div class="submit">
<?php submit_button( __( 'Add Custom Field' ), 'secondary', 'addmeta', false, array( 'id' => 'newmeta-submit', 'data-wp-lists' => 'add:the-list:newmeta' ) ); ?>
</div>
<?php submit_button( __('Upload file and import'), 'button' ); ?>
<div class="find-box-buttons">
<input id="find-posts-close" type="button" class="button alignleft" value="<?php esc_attr_e('Close'); ?>" />
<?php submit_button( __( 'Select' ), 'button-primary alignright', 'find-posts-submit', false ); ?>
</div>
Jess