Hi friends! I would like to resume the conversation about an old question. I didn't see a definite answer to it.
The problem occurred after installing the subdomain (sd): when I try to log in to my account (wp-login or wp-admin), I find myself on the base domain. In addition, when trying to log on to the sd site, I get the message "WP already installed", and in the address bar i see "sub.domain.com/wp-admin/install.php".
What I have:
I'm not activate the Redis and no plugins for sd site. I tried replacing in wp-config.php the entry "define('WP_CACHE_KEY_SALT', 'redis_object_cache_for_wp_sub.domain.com');" to "define('WP_CACHE_KEY_SALT', 'sub.domain.com');", but that hasn't helped either. I made similar on other sites, but it again didn't bring result. Other sites work correctly.
I dug up my grandmother's grave and performed a pinky-eating ritual. It doesn't help, but something in my stomach is moving. That it? I will continue, but I hope for your help too.