Element 'web-app' cannot have character [children], because the type's content type is element-only.

这个错误是由于你在一个只能包含元素的标签内添加了字符（文本）内容。在这种情况下，您需要将文本内容放到一个元素内，或者确认您是否使用了正确的标签。

例如，如果您正在处理一个 web.xml 文件，您可能会遇到这个错误，因为 web.xml 文件的顶层元素是 `web-app`，它只能包含其他元素，不能包含字符内容。如果您在 `web-app` 标签中添加了字符内容，那么就会导致这个错误。

要解决这个问题，您需要检查标签的内容类型，并确保只包含所需的元素。如果需要添加文本内容，您可以将其放在合适的元素内，或者创建一个新的元素来包含它。

相关问题

Element 'project' cannot have character [children], because the type's content type is element-only.

As an AI language model, I do not have enough context to determine the exact meaning of this message. However, in general, this error message indicates that there is an issue with the syntax or structure of an XML document. It is likely that the XML document contains an element called 'project' that is defined as having a content type of 'element-only', meaning it cannot contain any character data. However, the document includes character data within the 'project' element, which is not valid according to the element's definition. To resolve this issue, the XML document should be reviewed and corrected to ensure that all elements are properly defined and structured.

Element 'plugin' cannot have character [children], because the type's content type is element-only.

This error message means that the XML element called "plugin" cannot contain any text or other elements within it. This is because the definition of the "plugin" element only allows other elements to be nested inside it, not character data.

To fix this error, you need to remove any character data that may be present within the "plugin" element and only include other elements inside it. Alternatively, you can modify the definition of the "plugin" element to allow character data by changing its content type to "mixed" instead of "element-only".