403 - Forbidden | Error on Cloud self-hosted n8n

Hello, I am having this issue on n8n, whenever I try to upload a file to vapi I get a 403 error. I have been trying for hours and no results, the keys and parameters are correct, still I get this result.

I should have the file sent as a multipart/form-data.

It seems that Vapi blocks my IP address. Need to get this solved As soon as possible.
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