Magento 2 - Can't log in to backend after changing cookie domain

Question

My magento project is running on a subdomain redesign.company.de.

I have changed the cookie domain from empty to .redesign.company.de, because I often had issues where my site was loading forever and nothing happend until I delete all magento cookies.

Then I deleted all browser cookies and flushed the magento cache.

Problem:

If I try to login to the backend (admin) then the login form just reloads without any error showing.

My only option is to override the value from the database.

But how should I set the cookie domain correctly?

Answer 1

Try adding the cookie domain as www.company.de (if you have a prod env on that domain) and redesign.company.de on your staging/ test environment.