Infinite redirect, what's the reason?

Question

ISPmanager

Hello!
I use ISP Manager on the server, the domain has the following FastCGI settings (Nginx + PHP-FPM). Accordingly, the htaccess file is not executed, and therefore removed from the server. The domain uses the HTTPS protocol. The question arose, how to redirect from HTTP to HTTPS? In ISP Manager, the domain has an option "Redirect HTTP requests to HTTPS". When you turn it on, an infinite redirect occurs. Although the script itself does not provide any redirects and I repeat there is no htaccess file.
In the end, how to make a redirect from HTTP to HTTPS?