Specific students forms stuck on rendering

I'm trying to print out specific forms for my students (pre-filled) and I've done it for all of my classes except one. One class is stuck at the rendering stage and just sits there before the webpage logs me out. I've tried it on two different computers and two different browsers with the same results.

I've made plenty of tests and have always been able to print out the pre-filled in forms until this one class on this one test. 

I've cleared my cache and cookies and still causes the issue.

Any ideas?


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