subash sharma There are following possibilities:
1) Tags are syncd but resource lookup not working for tags.
2) tags are not syncd.
mostly I think tags are not syncd can you please check ranger db for x_tag table,
use ranger;
select * from x_tag;
if you dont see any entry in this table , then there should be some issue with tag sync, so please check tagsync.log under /var/log/ranger/tagsync on tagsync node