LSAT Practice Test

Today I tried taking a practice test. I made it through the first 35 min section and when the time elapsed everything froze. Ive been trying to refresh the page and resume from where I left off, but every time I go back into the exam it freezes in the same spot. I get left with a white screen or if there is buttons for me to press they don't do anything. I'm really hoping I don't have to retake everything I've done again.