这是问题所在:
<dependency>
<groupId>org.axonframework</groupId>
<artifactId>axon-spring-boot-starter</artifactId>
<version>3.0-RC1</version>
</dependency>
应该:
<dependency>
<groupId>org.axonframework</groupId>
<artifactId>axon-spring-boot-starter</artifactId>
<version>3.4</version>
</dependency>
因为您将轴突库升级到v3.4。