Why might a redirect from www to non-www not work?

Question

Apache HTTP Server

There is a vesta, I didn’t change any configs after installing it, I ran into the fact that

RewriteEngine on
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ http://%1/$1 [L,R=301]

or the same but only with a specific indication of domains - it doesn’t work
if you type .htaccess, then a 500 error occurs,
if you simply write RewriteEngine on, then everything opens normally
But if the rules are specified, then it does not open either via www or without www
What could be the problem ? How can I make Vesta immediately create domains without www?

Answer 1

give the whole .htaccess