[CX] SELECT COUNT(_id) AS COUNT_EMPLOYEE FROM default gives error

Query issued:

SELECT COUNT(_id) AS COUNT_EMPLOYEE FROM default_shadow;

"msg": "Syntax error: In line 1 >>SELECT COUNT(_id) AS COUNT_EMPLOYEE FROM default_shadow;<< Encountered '(' \"(\" at column 13. "

Above query works fine in n1ql.
Attaching dataset.