Hello Tonya Rains
We are aware of this issue with the Unknown Form error and are seeking a solution for it. This most typically occurs in Safari but other browsers have reported the issue. I suggest that you clear the cache of whichever browser you most frequently use prior to trying again and if the issue persists, please try filing your case using a different browser and you should be able to have your case filed.
Apologies for any inconvenience this causes.