I can't log in to the Wordpress admin panel... some kind of redirect... What should I do?

Question

local server

This picture appears when you try to log in to sitename /wp-admin
And in the address bar it says: 127.0.0.1 (this is the address of the database, as I understand it...)
you click on the console, then the same garbage ....
Site on the local OPenServer. Yesterday everything worked... today I start and such a thing, the rest of the sites work fine.... It turns out that I can't just get into the console.
What I did: I checked all the rules in the siteurl and home database. First I disabled all plugins and then the theme, but the same 127 didn't help... Updated WP-LOGIN.php. then I added my URL to wp_config.php. Cleared Cookies and Cache. So far, all in vain ...
Tell me how else you can try to fix the error?
PS there are backups of both the database and the site ... but I want to understand how to deal with such an error manually.
Thank you for your attention.

Answer 1

Problem solved.
.htaccess
Plugin safely put a bunch of rules in there...
RewriteRule . 127.0.0.1 [L]
I tried replacing with RewriteRule . /index.php [L] or RewriteRule . /sitename/wp-amin[L].
But apparently it did not help, you need to know the admin panel url, or just something was in conflict.