One or more of your photos is breaking some form of copyright, whether it be that the photos require proper attribution or are licensed in such a way that they are not free to use. For more information, check out this post here on steemstem copyright standards.
Sincerely,
@kryzsec
Hi @Kryzec i thank you for the comment i´ll put the references of the photos in the post in a few seconds, i take care of all the reference about the documental sources and totally forgot the photo sources. thank you. It´s ok to use one single reference for all the photos as in my case i took it all from the same web site or is preferable to put a link by link of each image?