Oracle Error ORA-19126: XQuery extension expression contains neither a pragma that is recognized by the implementation nor an expression enclosed in curly braces

Oracle Error Message

ORA-19126: XQuery extension expression contains neither a pragma that is recognized by the implementation nor an expression enclosed in curly braces

Reason for the Error

No expression was enclosed in curly braces for the extension expression or the pragma content was not recognized.

Solution

Correct inputs to extension expression.