Custom Login bar button shows blank screen on click

I created a lightbox custom signup and a lightbox custom login form for my website Fraternal | IN York Rite PHA . When I click the Register/Log In button on the home page it shows a blank white screen. I have made sure to check that I have enabled the use of the custom signup form. I have made sure that it is chosen in the Login Bar Settings as well. When I change the signup and login forms to the default ones the Login Bar function works fine. Can anyone please provide me some assistance with this issue?