Before we dive into the guts of the issue, we're going to need you to do
 a few things for us, things that sometimes fix issues for users before 
more extensive troubleshooting is needed.  Can you please follow  Steps 1-3 
 of our Solving Technical Issues checklist (confirm you're using the latest  non-test  version of Firefox or Chrome; turn off  all  extensions, addons, and anti-virus; and clear your cache) to see if 
one of those components is causing the problem?  We can only help if we 
can recreate your issue, so it is important that you follow each step.  If doing that fixes the issue, just let us know.  Otherwise, move on to  Step 4 , and we'll need  all  that information to further assist you.