Why doesn't Spring boot see the annotations?

Question

Spring

Why doesn't Spring boot see the annotations?
How can the problem be solved?
(Annotations glow red)
code:

import org.modelmapper.ModelMapper;
import org.springframework.context.annotation.*;
@Configuration
public class MapperUtil {

    @Bean 
    public ModelMapper getMapper() {
        return new ModelMapper();
    }

}

Answer 1

There's a "Maven" tab on the right side of the idea. And there is such an icon with two arrows like an ouroboros: "Reload All Maven Projects".