在索引 X 找到後面沒有低 Surrogate 字元的高 Surrogate 字元。可能不是使用此編碼方式輸入，或可能不包含有效的 Unicode (UTF-16) 字元。

Found a high surrogate char without a following low surrogate at index: X. The input may not be in this encoding, or may not contain valid Unicode (UTF-16) characters.