config error: Reason: java.lang.IllegalArgumentException: 'name' must not be null

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2025-08-20T00:04:54.692+08:00 ERROR 16930 --- [trace-java-gw-demo] [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Failed to bind properties under 'spring.cloud.gateway.server.webflux.routes[0].filters' to java.util.List<org.springframework.cloud.gateway.filter.FilterDefinition>:

    Reason: java.lang.IllegalArgumentException: 'name' must not be null

Action:

Update your application's configuration


Process finished with exit code 1

spring:
  cloud:
    gateway:
      server:
        webflux:
          routes:
            - id: user-service
              uri: http://localhost:8081
              predicates:
                - Path=/gw/**
              filters:
                - AddRequestHeader=X-Request-Id, rpcid-${random.value}
                - StripPrefix=1

when i write some config, start application.

help! thx

Start by reproducing the application startup failure with the Spring Cloud Gateway YAML shown in the issue, focusing on the routes[0].filters binding and the AddRequestHeader and StripPrefix entries. Done means the configuration binds successfully and the application starts without the null-name IllegalArgumentException.