the site only works on the move

[agnieszka_muza1]

I have a problem with the school website. Yesterday I added new materials on the site and after the publication it works exclusively on the move. Some pages are not displayed in the site's creator. On the computer, the page has only the background after loading. It's mobile without any problems. Maybe someone knows the solution to this problem.

[Adam7]

What is the address of the site you're having trouble with, @agnieszka_muza1?

[agnieszka_muza1]

www.spmotarzyno.weebly.com 

We were able to restore the page with old themes. Unfortunately, we have lost all the themes made by a graphic artist. We suspect that the cause of the problems was one of the weebly applications that stopped working and was responsible for grouping and blocking the background. We have lost the texts and links that were grouped by her. Thank you for contact. Are there other ways to solve our problem?
Despite the archiving of the zip files, I have not found the possibility of restoring the page with their help.
Regards and sorry for my English - translator.