Error when trying to make AAF from FCP

The fcpxml it's too heavy and I can not send it by here, do you have an email where I can send it to?

We will need your fcpxml file and the text of any error message to investigate, looking at the picture we will also need to have some samples of the media files.

I've been trying to make an AAF from FCPX but I keep getting that a file is not working, if I remove the audio from that take then I will get the same error but with a different take, and so on, and so on.
My footage was made with an Alexa SKT.
Hope you guys can help me cuz I need to send this project to my sound editor ASAP.