Is this the same issue as your active issue Errors at recover? I hate to just say same help advice.
Let me give some more specific requests to make sure you’re not in the usual browser mess-up.
What browser is this, and have you checked its settings to be certain it’s not filling in passwords?
If the browser is Microsoft Edge, is it the new one Microsoft has been pushing or the original one?
I was given new Edge, and its two password settings are reachable from Settings → Passwords.
Are either turned on (slider on the right)? If you prefer them on, look below for Saved passwords.
Delete anything for Website which is Duplicati (typically 127.0.0.1:8200, but check browser bar).
EDIT:
New Edge toggles don’t seem to stop its autofill, so try deleting 127.0.0.1:8200 saved password.