502 Bad Gateway

I cannot access to my site - smizla.22web.org
Receaving a message - 502 Bad Gateway.
How to resolve this, pls.
I already tried to clear cookies, restarting browser… without help.

The site is working fine from here.

Yes, now is working for me too, but now I cannot access to phpMyAdmin page.

I’m getting the error ERR_TOO_MANY_REDIRECTS

Too much errors for one day, I would say.