OpenAI API returns body as empty

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Bug description
There is a problem calling my private cloud OpenAI service using OpenAiApi

But using openai4j is normal

Using Postman is also normal

Environment
<java.version>17</java.version>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
<spring-framework.version>6.2.4</spring-framework.version>
<spring-boot.version>3.4.3</spring-boot.version>
<spring-ai.version>1.0.0-M6</spring-ai.version>
<spring-cloud.version>2024.0.0</spring-cloud.version>
Steps to reproduce

    @Test
    public void openaiTest() {
        OpenAiApi openAiApi = OpenAiApi.builder()
                .apiKey("")
                .baseUrl("")
                .completionsPath("chat/completions")
                .build();

        try {
            OpenAiApi.ChatCompletionRequest chatRequest = new OpenAiApi.ChatCompletionRequest(
                    Arrays.asList(new OpenAiApi.ChatCompletionMessage("你是谁", OpenAiApi.ChatCompletionMessage.Role.USER))
                    , "DeepSeek-R1", 0.7, true);
            Flux<OpenAiApi.ChatCompletionChunk> chatCompletionChunkFlux = openAiApi.chatCompletionStream(chatRequest);
            System.out.println(chatCompletionChunkFlux.blockLast());
        } catch (WebClientResponseException e) {
            System.err.println(e.getResponseBodyAsString());

            e.printStackTrace();
        }
    }

<dependency>
            <groupId>dev.ai4j</groupId>
            <artifactId>openai4j</artifactId>
            <version>0.17.0</version>
        </dependency>

    @Test
    public void test1() {

        OpenAiClient client = OpenAiClient.builder()
                .baseUrl("")
                .openAiApiKey("")
                .logStreamingResponses()
                .logLevel(LogLevel.DEBUG)
                .logRequests()
                .logResponses()
                // other customizations coming soon!
                .build();

        ChatCompletionRequest request = ChatCompletionRequest.builder()
                .model("DeepSeek-R1")
                .stream(true)
                .addUserMessage("你是谁")
                .temperature(0.7)
                .build();

        client.chatCompletion(request)
                .onResponse(response -> {
                    System.out.println(response.content());
                })
                .onError(error -> {
                    System.out.println("Error: " + error.getMessage());
                })
                .execute();
    }

Expected behavior
What problem causes the body to be empty

Minimal Complete Reproducible example
Please provide a failing test or a minimal complete verifiable example that reproduces the issue.
Bug reports that are reproducible will take priority in resolution over reports that are not reproducible.

Start with the OpenAiApi.chatCompletionStream call in the openaiTest example and compare its behavior with the openai4j test1 example. Reproduce the request against the private cloud service using the supplied Java and Spring AI versions, then inspect the response handling and establish a failing test that captures the empty body.