Hi Pyerre Marcos Goulart Silva,
Welcome to Microsoft Q&A Forum, thank you for posting your query here!
Please add the 'Storage Blob Data Contributor' role, it should resolve this issue.
Please go to Azure Portal, go to the storage account you connected to your Azure Language resource, on the left panel, select Access Control, click the Add button and add the role as the second screenshot.
Add 'storage blob data contributor' role for the user on the storage account even though you are the owner of the storage account.
Please have a try and see how it works,
Please let us know if you have any further queries. I’m happy to assist you further.
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