Hi, I'm putting the the pre-defined field an amount $35.00, however, it's just showing up as $0.00 in checkout. Also,when I click submit it doesn't go to paypal, it goes to a blank white error page. I have to launch the site today so it's very important.
Please submit a support ticket sending us super admin account of your site. I am going to check to see what's causing the issue and get it sorted for you