Everyone got logged out after the recent site hack. For me, when I tried logging in once things were back up, it would tell me I logged in, but I’d actually stay logged out.
I assumed the systems were still just down, but when I noticed others were able to log in and post without issue I tried clearing site data - that let me right in.
In Firefox or Chrome you can do so quickly by clicking the lock to the left side of the address bar.
Figuring I might not be the only one and some stuck-logged-out people may see this.
With Memmy and wefwef it seemed like I was logged in, but apparently I wasn’t. When I logged in once more like I would log in to a different server (but in this case same server name, user, password) it worked fine again.