How to enable authorization via htaccess along with a redirect to https?

Question

htaccess

After moving the site to https, authorization through htaccess to the admin panel stopped working.
.htaccess content:

RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]

# Статические страницы
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]*)/?$ index.php?module=PageView&page_url=$1 [L,QSA]
RewriteRule ^/?$  index.php?module=MainView&page_url= [L,QSA]

When entering /admin , it immediately gives an error 401 Unauthorized, and if you comment out the first 2 lines, everything works fine. Tried redirecting to https in many different ways, including exclusion of /admin from redirecting as per this question , but still doesn't work. Perhaps he did something wrong. Tell me, please, what could be the problem and what code is needed for htaccess.
Perhaps this is due to the fact that everywhere URLs have become like this: /index.php?module=MainView&page_url= ?