Nostalrius Begins - Quality wow vanilla realm (1.12)

Whenever I attempt to login to the server by double-clicking on the "WoW Classic" icon in the folder from the download, the screen becomes crazy and the lower left hand fourth of the screen displays the login screen.

When I try to scroll down OR click accept/decline, the buttons do not become highlighted as if the mouse is not in the correct position to click.

HALP!