Too many redirects - htaccess

Question

I'm trying to set up redirect from www to non-www and from http to https using htaccess, but I'm getting "too many redirects" error. My htaccess is:

RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} ^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]

and some headers (XSS, CSP...)

Answer 1

我的虚拟主机使用的是由于反向代理。