Password required for first start

I have just installed Duplicati 2 beta msi on my laptop (Lenovo T420s, Win X64, 1903). Accepted the pre-set “launch now” function. Duplicati started,
asking me for a password which I have not. It is my first time. I understand I should get an option to create a password but I don’t have a clue how to do that. Grateful for any help.

Try going to just http://localhost:8200

Does it redirect you to login.html?
Without a password it should redirect you to ngax/index.html.

Welcome to the forum!