java.lang.NullPointerException: Cannot invoke "io.agentscope.core.tool.Toolkit.getToolSchemas()" because "this.toolkit" is null #3

public static void main(String[] args) {
    Model model = DashScopeChatModel.builder()
		.apiKey(System.getenv("DASHSCOPE_API_KEY"))
		.modelName("qwen-max")
		.build();

    ReActAgent agent = ReActAgent.builder()
    .name("hello-world-agent")
    .sysPrompt("You are a helpful AI assistant. Be concise and friendly. " +
               "When thinking through problems, use <thinking>...</thinking> tags to show your reasoning.")
    .model(model)
    .memory(new InMemoryMemory())
    .formatter(new DashScopeChatFormatter())
    .build();

    Msg userMessage = Msg.builder()
        .role(MsgRole.USER)
        .textContent("Hello, please introduce yourself.")
        .build();
    Msg response = agent.reply(userMessage).block();

    System.out.println("Agent Response: " + response.getTextContent());
}

[main] WARN io.agentscope.core.hook.HookManager -- Hook execution failed for reply
java.lang.NullPointerException: Cannot invoke "io.agentscope.core.tool.Toolkit.getToolSchemas()" because "this.toolkit" is null
	at io.agentscope.core.ReActAgent.lambda$reasoning$3(ReActAgent.java:121)
	at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:153)
	at reactor.core.publisher.MonoFlatMapMany.subscribeOrReturn(MonoFlatMapMany.java:49)
	at reactor.core.publisher.Flux.subscribe(Flux.java:8876)
	at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:202)
	at reactor.core.publisher.MonoFlatMapMany.subscribeOrReturn(MonoFlatMapMany.java:49)
	at reactor.core.publisher.Flux.subscribe(Flux.java:8876)
	at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:238)