Oracle Solution for Error ora-19296

ORA-19296: XQDY0061: It is a dynamic error if the operand of a validate expression is a document node whose children do not consist of exactly one element node and zero or more comment and processing instruction nodes, in any order

What triggered the Error:

error occurred during the processing of the XQuery expression.

What should we do to fix it:

eck the detailed error message for the possible causes.