Oracle Message ORA-19146 - XQST0088: It is a static error if the literal that specifies the target namespace in a module import or a module declaration is of zero length

ERROR	XQST0088: It is a static error if the literal that specifies the target namespace in a module import or a module declaration is of zero length
CAUSE	An error occurred during the processing of the XQuery expression.
ACTION	Check the detailed error message for the possible causes.