Version 4.1.2

applications/nexus/modules/admin/store/coupons.php

@@ -71,7 +71,7 @@ class _coupons extends \IPS\Node\Controller
 		$table->parsers = array(
 			'coupon_customer'	=> function ( $val )
 			{
-				return \IPS\Theme::i()->getTemplate('global')->userLink( \IPS\Member::load( $val ) );
+				return is_numeric( $val ) ? \IPS\Theme::i()->getTemplate('global')->userLink( \IPS\Member::load( $val ) ) : $val;
 			}
 		);
 		$table->sortBy = 'coupon_uses';