Magento 2 admin panel is down after changing Base URL

I have changed Base URL secure and unsecure from the backend. I had the following url= http://subdomain.domain.org/folder (also https) and I changed it in order to have http://subdomain.domain.org/. The frontend is currently working fine as http://subdomain.domain.org, but the backend for some reason stopped working, and now it trows an error Not Found.

The way I access the backend is http://subdomain.domain.org/folder/admin I did not change the admin url and cannot access to that url.

I have changed all old URL in core_config_data table, but its not working yet.

Greetings!