Unable to access duplicati from browser after update

http://localhost:8200/
We updated duplicati from 2.0.8.1_beta_2024-05-07 to 2.1.0.2.
After update, it asked for password, as we couldn’t find the password at that time.
We tried killing processes for duplicati backup from windows machine. Now it’s not popping up that login page. Has someone faced such issues?
When I try to access localhost:8200 from browser it shows up “can’t reach this page”

Welcome to the forum @jirelanita01

If you kill Duplicati processes (Task Manager I assume), killing them all leaves no Duplicati.
Do you recall what you killed? Typical users would run a single Duplicati.GUI.TrayIcon.exe

If there’s nothing left, you can start one from Desktop or Start. Find it in Tray and left click it.
This will let you in without a password. Maybe you didn’t set one in 2.0.8.1? Need one now.
Settings screen will let you do that, and then you can go directly to URL if you like that way.

Duplicati Access Password discusses, and a link to that page is being added on login page:

image