I logged in for the first time in a long time yesterday. My account credentials weren't recognised, so I successfully went through the "Forgot password?" process.
I set a new password consisting of 12 characters, including uppercass and lowercase letters, numbers, and symbols.
Yesterday's post received a reply, so I tried to login again. My new account credentials weren't recognised, so I successfully went through the "Forgot password?" process again. Thankfully,, I am logged in at the end of that process, which means that it is possible for me to write this post.
I imagine that I will try to log in again tomorrow, and I strongly suspect that these new account credentials won't be recognised, either.
Any suggestions? Sometimes, I have found (on other websites) that including symbols can render a password invalid, despite apparently being accepted.