Why did traffic to the site drop?

Question

Search Engine Optimization

Good day to all!
Today the website www.medknizh-msk.ru/ has seen a sharp drop in attendance. At 60%.
Three days ago, we added an adaptive version of the site and periodically made changes. Could this have affected?
And this morning we put the preloader on the site. Now removed. There are no sanctions from the PS. Positions have not fallen.
Why such a sharp drop in traffic to the site?

Answer 1

Most likely, when adapting, they messed up somewhere, you need to dig.
As for js, they apparently fixed it, I don’t see any blocking.
There is only a mixed content error.
The site is on https, and the fonts are loaded via http, respectively, a mixed content error is generated.
Connect fonts via https or protocol-independently like //fonts. gstatic. com...