Some users getting 'Page cannot be found' errors

Some users getting 'Page cannot be found' errors

I was helping two users sitting side-by-side through first-time enrollment today; both are using identical computers, both are using Chrome.

The first user filled out the security questions and answers and the enrollment worked fine.

The second user filled out the security questions and when she clicked enroll she got an error message that the page couldn't be found (With back' and 'sign out' links, so a ADSS generated page and not a default browser one).

Since there were no differences in hardware or software, I am wondering what else might be the culprit. Thus far in our testing 8 users have enrolled successfully and 2 have been unable to enroll due to that error.

Additionally, where can I find the options to edit text on the enrollment page? Some of our users have expressed confusion regarding the custom question field, and I wish to better explain it on the page.
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