无法在Spring boot应用程序中自动连接brave.Tracer

<dependency>
    <groupId>io.zipkin.brave</groupId>
    <artifactId>brave-spring-boot-starter</artifactId>
    <version>5.13.2</version>
</dependency>
<dependency>
    <groupId>io.zipkin.reporter2</groupId>
    <artifactId>zipkin-reporter-brave</artifactId>
    <version>2.16.3</version>
</dependency>

implementation 'io.zipkin.brave:brave-spring-boot-starter:5.13.2'
implementation 'io.zipkin.reporter2:zipkin-reporter-brave:2.16.3'

spring:
  zipkin:
    base-url: http://localhost:9411
brave:
  sampler:
    probability: 1.0

spring.zipkin.base-url=http://localhost:9411
brave.sampler.probability=1.0

import brave.Tracer;
import brave.sampler.Sampler;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class TracingConfig {

    @Bean
    public Tracer tracer() {
        return Tracing.newBuilder()
                .sampler(Sampler.ALWAYS_SAMPLE)
                .build().tracer();
    }
}