How to fix an error 'Object reference not set to an instance of an object' in the Azure OpenAI connector (Logic App)

Question

I am getting the following error when setting up the azure openAI connector in the logic app.

{ "error": { "code": 500, "message": "Object reference not set to an instance of an object.", "source": "50eea81724bd4d5c.17.common.logic-canadacentral.azure-apihub.net", "path": "choose[3]\when[2]", "policyId": "", "clientRequestId": "190d6a00-f429-4078-a8d5-760189018e05" } }