idea启动RouYi（若衣）项目报错，Failed to parse configuration class，Caused by: cannot be opened because it does not exist

最近学习用idea。尝试导入若衣的开源项目，发现启动不了。
网上看了好多答案乱七八糟的，具体报错为，求教。

。

git clone https://gitee.com/y_project/RuoYi.git

。

另外，我重新克隆并导入数据后，运行成功了，所以我不知道两次相同的操作为什么会有一次报错。

 [restartedMain] ERROR o.s.b.SpringApplication - [reportFailure,858] - Application run failed

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.ruoyi.RuoYiApplication]; 

nested exception is java.io.FileNotFoundException: class path resource [com/ruoyi/common/core/controller/BaseController.class] cannot be opened because it does not exist

    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:181)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:315)
。。。此处省略更多

Caused by: java.io.FileNotFoundException: class path resource [com/ruoyi/common/core/controller/BaseController.class] cannot be opened because it does not exist

    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:180)
    at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:51)
。。。此处省略更多
    ... 18 common frames omitted

com/ruoyi/common/core/controller/BaseController.java或者.class这个包是否不存在，提示没找到。

eclipse的项目导idea...好像项目结构不一样吧

报错的原因可能是文件缺失或者只读或者权限不够