Locked out of AC1900

Need some help with not being able to access my AC 1900

I did something stupid.

I was looking around the Administration under Advanced settings and selected System
I saw that the authentication method can be changed from both to only "https" ... so I changed it and pushed
apply.

Now I get this

"Settings have been updated. Web page will now refresh.
Changes have been made to the IP address or port number. You will now be disconnected from RT-AC68U.
To access the settings of RT-AC68U,...

Locked out of AC1900