Unable to log in the administration panel

How are you access your admin dashboard? https://your-site/wp-admin/ should re-direct you.

Yes, I have redirect https://audiobook-online.com/wp-login.php?redirect_to=http%3A%2F%2Faudiobook-online.com%2Fwp-admin%2F&reauth=1

No it was not hacked. Try deleting your .htaccess file and login.

I did so, but it did not help: ERR_EMPTY_RESPONSE

Have tried to disable all plugins?
disable plugins

Did you checked your error log about it?

Or maybe give it a try adding this to your htaccess file

php_flag opcache.enable Off

Hi @aadhaar thanks for chiming in but please keep the links in www.remarpro.com when possible. I’ve updated the disable plugins link. ??

@alexander70

If it’s a plugin (it could be) give this a try.

1. Using FTP or whatever file management tools your host has provided you with navigate to the wp-content directory.
2. Once there locate and rename (do not delete!) the plugins directory. Just that one directory and nothing else.
3. Try and re-login to your WordPress dashboard.

In my draft site https://disability-people.com/wordpr/ the same problem. I’ve renamed the plug-ins folder but it did not help

Try https://disability-people.com/wordpr/wp-admin/ and see if you can get in.

Without changes
https://pixs.ru/showimage/05092015jp_7406803_18685797.jpg

It seems that my problem related to hosting Godaddy. I installed a new wordpress site and also can not access the administration panel.

Have you tried this in a new browser by clearing your cache? I mean your new wordpress site?