Error 404 for Azure AI Vision API endpoint

I am using Azure AI computer vision for Search photos with image retrieval service. I have created the service in Central India and East US region with Standard pricing tier. I am using the API key and endpoint for image embedding in jupyter notebook.

Here is my code:

def image_embedding(image, endpoint, key):
    """
    Image embedding using Azure Computer Vision 4.0 (Vectorize Image API)
    """
    with open(image, 'rb') as img:
        data = img.read()

    # Image retrieval API
    version = "?api-version=2023-02-01-preview&modelVersion=latest"
    vectorize_img_url = endpoint + "retrieval:vectorizeImage" + version

    headers = {
        'Content-type': 'application/octet-stream',
        'Ocp-Apim-Subscription-Key': key
    }

    try:
        r = requests.post(vectorize_img_url, data=data, headers=headers)

        if r.status_code == 200:
            image_vector = r.json()['vector']
            return image_vector
        else:
            print(f"An error occurred while processing {image}. Error code: {r.status_code}.")
        
    except Exception as e:
        print(f"An error occurred while processing {image}: {e}")

    return None

# Load environment variables
load_dotenv()
endpoint ='https://Service_Name.cognitiveservices.azure.com/'
key = 'API_Key'

# image embedding
image = r'C:\Users\HP\Downloads\[Hidden].jpg'
image_emb = image_embedding(image, endpoint, key)
# display the image
plt.imshow(Image.open(image))
plt.axis('off')
plt.show()

The error seems to be associated with API endpoint.

Key points to consider:

1. The code is error free and is tested earlier with correct outputs.
2. API endpoint and key are copied correctly.
3. Image path is accurate.
4. All libraries are loaded.