Query Builder multi path search

Why the following query

type=cq:Page

1_group.1_path=/content/we-retail/it

1_group.2_path=/content/we-retail/fr

1_group.3_path=/content/we-retail/us

1_group.p.or=true

orderby=@jcr:lastModified

orderby.sort=desc

produce this error:

Could not run xpath query

javax.jcr.query.InvalidQueryException: java.text.ParseException: (/jcr:root/content/we-retail/it//element(*, cq:Page) | /jcr:root/content/we-retail/fr//element(*, cq:Page) | /jcr:root/content/we-retail/us//element(*, cq:Page)) order by @jcr:lastModified descending converted to SQL-2 Query: select [jcr:path], [jcr:score], * from [cq:Page] as a where isdescendantnode(a, '/content/we-retail/it') /* xpath: /jcr:root/content/we-retail/it//element(*, cq:Page)  order by @jcr:lastModified descending */ union select [jcr:path], [jcr:score], * from [cq:Page] as a where isdescendantnode(a, '/content/we-retail/fr') /* xpath: /jcr:root/content/we-retail/fr//element(*, cq:Page)  order by @jcr:lastModified descending */ order by [jcr:lastModified] desc union(*)select [jcr:path], [jcr:score], * from [cq:Page] as a where isdescendantnode(a, '/content/we-retail/us') /* xpath: /jcr:root/content/we-retail/us//element(*, cq:Page) order by @jcr:lastModified descending */ order by [jcr:lastModified] desc; expected: <end>

NB: if I remove a path the query is successfully executed. If I remove the orderBy and leave the three paths the query is successfully executed, but naturally the results are not ordered.

Please help me.

Thanks