According to this Page of the site, some images are getting offline, I go to the server, I look for the address again and I update, but 1 or 2 days later it gets this way again, the interesting thing is that it's just some, the others never happened that way.
Obs. The images are at the bottom of the page where the table is written. 
When I say I go to the server and copy again, I get the link and delete what is at the end of the link, leaving it ending in .png ... Does this interfere?
Where I mention the error, it's actually an iframe, the error happens in that iframe that is on the page.