Cant login to matrix-chat


here [2] chat - opendesktop - org the hint

Sign in to your Matrix account on

is displayed. No registration option is offered.
I registered at [1] today. My questions:

1)Is it correct that my username/password from website [1] can also be used for [2]?
2) If the answer to question 1) is “No”, where can I register username/password for [2]

I use lowercase letters for login. That is hint for browser-based-login:

Browser Chromium Version 91.0.4472.101 (Official Build) Built on Ubuntu , running on Ubuntu 18.04 (64-bit)

With SchildiChat App I get this message after the login attempt:
“It looks as if the server takes too much time to respond. The reason may be a bad connection or an error on the server. Please try again later”

Is it a bug, or I’m doing something wrong?

See Matrix chat first login: 504 timeout