Haystack rest api document response in xml instead of JSON

[sivakumarl]

Hi Team,
I am trying to launch the haystack explore_the_world demo, able to launch the app successfully , but unfortunately the response from the haystack rest api is not able parse and display in the streamlit ui because the documents in the response are not in valid JSON format. Can you please assist if i am missing any configuration for haystack rest api side. Thanks

Response:
INFO: haystack:{"request": "query="What's the capital of France?" params={'filters': {}, 'Retriever': {'top_K': 3}, 'Reader': {'top_K': 3}, 'Query': {'debug': False}} debug=False","response": {"query": "What's the capital of France?",
"no_ans gap": 11.180335521697998,
"answers": ["<Answer: answer='Paris', score=0.985830759811401, context='everal islands in Oceania and the Indian Ocean. Du..'>",
"<Answer: answer='Paris', score=0.86905918653547 context='===Major Cities===\n\nFrance is highly urbanized c...'>",
"<Answer: answer='', score=0.59128055815517484, context=None>"],
"documents": ["**‹Document: id=658ca7dc53719244fae720632498a9e, content==='\n\n'''France'''(), officialy the '''French Republic'''(), is a transcontinental country spanning W...'>",
"<Document: id=273478d4a0093583bbda0c0d86e19151, content ='\n\n'''Paris''' () is the capital and most populous city of France, with an estimated population of 2,...'>",
"<Document: id=1a55d81dc0602aa40485c462c8aadzb, content='===Major Cities===\n\nFrance is highly urbanized country, with its largest cities(in terms of metro...'>_**")],
"root_node": "Query", "params":{"filters":{} "Retriever": {"top_K': 3} ,"Reader": {"top_K': 3}, "Query": {}}, "node_id": "Reader"}, "time": "7.63"}

Regards,
Siva Kumar.

[silvanocerza]

This seem related to issue #4406, can you confirm?