this weird thing has happened to me: I tried to login to one of my WP sites and it said:

This site can’t be reached
The connection was reset.
ERR_CONNECTION_RESET

The URL was: …%2Fwp-admin%2F&reauth=1

My issue si really similar to this one (discussed here before): Unable to login to my wordpress site. reauth=1 redirection loop. Any ideas on how to fix this?

However, I cannot login to any WP page – I tried couple of my other pages and then even some completely different, where pretty sure they are set up correctly (they are quite big and have been working for long time).

I can understand how this happens on the first site, but how is it possible that it effects all other WordPress sites as well?

Aby ideas how is this possible and how to fix it and prevent it from happening again?

Thanks a lot 🙂