Hello (from France),
For information, there is regulary a “Blank page” blocking bug during the Pratice Exam.
I find the Practice Exam very usefull.
I hope you could do something to resolve the bug.
Cordialement 
Fred.
1 Like
Hello Frédéric
I will let @ReneMolenaar know to take a look and see what the problem is. He will get back to you as soon as he can… Thanks for bringing this to our attention!
Laz