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

根据引用和引用，"@RestController"是一个注解，它通常用于标识一个类是一个RESTful风格的控制器。此注解告诉Spring框架该类的方法应该返回RESTful风格的响应。当应用程序没有为"/error"路径显式配置映射时，会出现报错信息"This application has no explicit mapping for /error, so you are seeing this as a fallback." 。

根据引用中的错误原因，如果没有在Controller类上添加@RestController注解，则会导致报错信息的出现。因此，解决办法是在Controller类上添加@RestController注解。

所以，要解决这个问题，您应该在适当的Controller类上添加@RestController注解，以确保正常处理"/error"路径的映射。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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