Log in does not work

I was fiddling with the L2TP over IPSec settings to connect to my network from my Android.

Suddenly, my log in information isn't accepted for WebAdmin.

I have no idea how those two things are related, but for some reason admin and my password are invalid.

I would rather not have to re install. Does anyone have any ideas? Because that would be reeeeaallly great!

Thanks in advance!