InvalidRequestError: File reference has the wrong format. Error when fine-tuning with Azure

Hello everyone,
I have been trying to fine-tune a model to use it with Azure Open AI.
After having uploaded the file, when I run the fine-tuning instance, I get this error:
InvalidRequestError: File reference has the wrong format.
How can I solve it?
Many thanks in advance
Screenshot 2023-10-10 155414

Moreover, when I upload the training file, I get status:notRunning, what does this mean?