No images loading on subpage

Hello!

I have the strange problem, that images are displaying properly on my site
velovilnius.lt, but not on any subpage velovilnius.lt/balticcycle velovilnius.lt/veloland
In the media library wp does not display them, but when I click on edit image it shows them to me. I can’t even upload any media (on the subpages, on the main page everything works properly).

I guess this is connected to a system update, and I found the pictures of each subpage in the the blogs.dir folder, but it seems they are not properly connected.
It there an easy way to reconnect them?
I found some descriptions of Rewrite Rules in the .htaccess file but none of it worked 🙁
After some days of trying I am getting desperate …