The package cannot be found during idea execution. The package does not exist. The symbol cannot be found but the corresponding jar package clearly exists.

Because the code uses lombok,
IntelliJ IDEA 2020.3 invalidates the lower version of lombok. Use an updated version.

<dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 <version>1.18.14</version>
 <scope>provided</scope>
</dependency>