Unsatisfied dependency expressed through field ‘baseMapper‘； nested exceptio

This error report is mainly because I use mybatis-plus When I met , There are two main reasons for this error report ：

1. The problem of imported dependencies ：
   Pay attention to use spring boot Integrate mybatis-plus The following dependencies are imported during

        <dependency>
            <groupId>io.github.Caratacus</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>1.0.9</version>

instead of ：

       <dependency>-->
            <groupId>com.suyeer</groupId>-->
            <artifactId>mybatis-plus</artifactId>-->
            <version>3.2.0.6</version>-->
        </dependency>-->

2. Annotation problem
   stay mapper Add to the class in the file @Mapper annotation

@Mapper
public interface UserMapper extends BaseMapper<Users> {
    
}

service Add... To the interface implementation class @Service annotation

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, Users> implements UserService {
    
}