LLM Prompter Error

I’m having trouble running a Knime workflow that calls ChatGPt through the OpenAI API to query it. If I run the Post Request node, having passed it my API Key and the prompt I want to ask, it works fine. However, when I use the LLM Prompter node, I get a connection error even though OpenAI Authenticator and OpenAI LLM Connector were previously running successfully. What should I change to get the LLM Prompter to run correctly? What I get after LLM Prompter excecution is

File “C:\Users\fmc00\AppData\Local\Programs\KNIME\bundling\envs\orgknimepythonllm5.4.3\Lib\site-packages\openaibaseclient.py”, line 1534, in _request

raise APIConnectionError(request=request) from err

openai.APIConnectionError: Connection error.

ERROR LLM Prompter 3:35 Execute failed: Connection error.