FTS with N1QL - settings mismatch

Hi,

  1. I am trying N1QL query with SEARCH() predicate. It is showing as “No index available on keyspace” although raw query is working using curl. Am i missing any settings?
  2. I also tried flex index for FTS with N1QL, there also it is picking GSI index. Please let me know if i need to add some settings somewhere?

Version - 6.6.0

Thanks
Nitesh