I came from a 1.9 version, I ran the auto upgrade scripts and after the migrations seems all ok, apart for an error on normal users. When I try to login with a "normal" user I have the error "too many redirects". If I login with an admin user, all seems ok. Even with a just promoted user, the thing come to work.
What to check? I have only http enabled, no https enabled nor configured in apache. The url in setting is in http.