Hello Marcos,
Sorry for late reply to this,
Could you can back up on your
blog.item.php file first then move my attachment file in your file location and see how it goes.
JoomlaFolder\components\com_easyblog\themes\origami\blog.item.php
Because we didn't have your FTP access so unsure that is help for you or not. If this php file didn't help at all, could you mind provide us your backend and FTP access so we can help you check on your issues here?