RequestFailedException(message: Invalid type for 'messages[1].content[1].image_url': expected an object, but got a string instead., statusCode: 400)

[lukehutch]

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When trying the chat example, I get:

RequestFailedException(message: Invalid type for 'messages[1].content[1].image_url': expected an object, but got a string instead., statusCode: 400)
#0      OpenAINetworkingClient.post (package:dart_openai/src/core/networking/client.dart:332:7)
<asynchronous suspension>
#1      OpenAIChat.create (package:dart_openai/src/instance/chat/chat.dart:87:12)
<asynchronous suspension>
#2      run (package:qa/qa.dart:68:46)
<asynchronous suspension>
#3      main (file:///Users/lhutchison/qa/bin/qa.dart:8:3)
<asynchronous suspension>