Nemo guardrails

Hi, I am using nemo guardrails for my solution and am facing the below error while configuring my azure openai endpoint in my config.yml:
This is what my config looks like:
models:

  • type: main
    engine: azure
    model: gpt-4o
    parameters:
    azure_endpoint: ““
    deployment_name: ““
    api_version: ““
    api_key: ““

I am getting following error
File “nemoguardrails\actions\action_dispatcher.py”, line 253, in execute_action
raise e
File “nemoguardrails\actions\action_dispatcher.py”, line 214, in execute_action
result = await result
^^^^^^^^^^^^
File “nemoguardrails\library\self_check\input_check\actions.py”, line 72, in self_check_input
response = await llm_call(llm, prompt, stop=stop)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “nemoguardrails\actions\llm\utils.py”, line 96, in llm_call
raise LLMCallException(e)
nemoguardrails.actions.llm.utils.LLMCallException: LLM Call Exception: ‘NoneType’ object has no attribute ‘create’

Would really appreciate some help here, thanks!