Fidget Spinner Contest Bug "invalid for contest"

I submitted a couple of projects to the findget spinner contest.  
https://www.instructables.com/contest/fidgetspinner/
One was recycled.  One was totally new.
I get the following message for the new project: 
"The entry is invalid for this contest".

tomatoskins2 months ago

I've seen this happening a few times. Usually clearing my browser cache/deleting cookies has solved the problem for me.