Can’t see www

Take a look at your .htaccess (main, usually these url-rewriting is done there.

Like
RewriteCond %{HTTP_HOST} ^www.domain.com$ [NC]
RewriteRule ^(.*) https://domain.org/$1 [L,R=301]

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>

Still problem

I can access https://www.ecoverslab.com/blog/ now without redirection, did you change anything?