error 500

Hello.
Faced with such a problem. After downloading media files (images) to the website, the picture does not show, and they open at 500 error page.
How it all began. I installed the plugin Yoast SEO, for it was required to change the permalinks, I changed to “record name”, and it began with pictures of the problem. as soon as I use a picture in
“LayerSlider WP” is immediately blocked. Suggest that it is necessary for them to just change the name and location of them, so I did but it did not help, they continue to be blocked. that’s one of the images that are blocked http://ipbonline.ru/wp-content/uploads/2016/08/tf22.jpg. please tell me how to solve this problem.