报告未解析的引用和无效的 Thymeleaf 表达式。
示例:
<html xmlns:th="https://www.thymeleaf.org">
<body>
<form th:object="${unknownPet}" <!-- Cannot resolve 'unknownPet' -->
class="form-horizontal" method="post">
<input type="hidden" name="id" th:value="*{id}" /> <!-- 无法解析 'id' -->
</form>
</body>
</html>