解释一下 This application has no explicit mapping for /error, so you are seeing this as a fallback.

这个应用程序没有针对 /error 的显式映射，因此您正在看到它作为一个后备选项。

这意味着当用户请求了一个未定义的页面或路径时，应用程序无法找到一个明确的错误处理程序，并且将返回一个默认的错误页面或消息。这种情况下，应用程序会使用一个默认的错误处理程序，例如 Spring Boot 提供的出错处理机制，以显示一个错误页面或者给出一条错误消息。

相关问题

This application has no explicit mapping for /error, so you are seeing this as a fallback.

This error message typically appears when a user tries to visit a URL that does not exist or has not been properly configured in the application. The message indicates that the application is unable to find an appropriate page to display for the requested URL, and instead displays a default error message.

To resolve this issue, you should review the application's configuration and ensure that all URLs are properly mapped to the appropriate pages. You may also want to check the application's logs for any additional information on the error, which can help you identify the root cause and develop a solution.