Joaquín Bonifacino I'm glad that your issue is resolved and thank you for posting your solution so that others experiencing the same thing can easily reference this!
Since the Microsoft Q&A community has a policy that the question author cannot accept their own answer, they can only accept answers by others, I'll repost your solution in case you'd like to Accept the answer.
Error Message:
openai.error.AuthenticationError: The Embeddings_Create Operation under Azure OpenAI API version 2023-05-15 is not supported with the current subscription key and pricing tier FormRecognizer.S0.
Solution:
It was that the deployed model didn't have the correct name
If you have any other questions, please let me know. Thank you again for your time and patience throughout this issue.