Moved multisite now theme doesn't work in subdirectory

So, I moved multisite from test subdomain to main domain and now theme doesn’t work in subdirectory. I have 2 blogs and one of them doesn’t work properly.
I can’t even access the dashboard on the second blog because it says: “This webpage has a redirect loop” and the page doesn’t show any pictures or theme.

Main page: https://www.natura-antunovic.com/
Subdirectory: https://www.natura-antunovic.com/en/

I made english version in subdirectory and it worked when I had it on test domain.