After upgrading to 2.x SDK, i'm seeing `Blazing Text Prediction Error: TypeError: string indices must be integers`

[cfregly]

sagemaker==2.16.1

I'm seeing this issue after upgrading the following sample to SDK 2.x: https://github.com/aws/amazon-sagemaker-examples/blob/master/introduction_to_amazon_algorithms/blazingtext_text_classification_dbpedia/blazingtext_text_classification_dbpedia.ipynb

here is the upgraded 2.x version: https://github.com/data-science-on-aws/workshop/blob/8ba7a00/08_train/wip/blazingtext_text_classification_dbpedia.ipynb

Traceback (most recent call last):
  File "/opt/amazon/lib/python3.6/site-packages/blazingtext/serve.py", line 308, in invocations
    texts = data["instances"]

TypeError: string indices must be integers

[SitiBanc]

Change response = text_classifier.predict(json.dumps(payload)) to response = text_classifier.predictor(payload) . You don't need to serialize your payload with JSONSerializer() specified.

[PacktAsh]

When I make similar call:
customer_entity.content_type = 'application/json'

I am seeing the following error:
customer_entity.content_type = 'application/json'

[martinRenou]

Closing for triaging. Please reopen if you feel like this still applies.