Difficult Words review needed but it says no difficult words

Link is here.
Why does it say I have a difficult word but I can’t review it?
That means I’m going to have a difficult word forever until I delete my memrise account.(Well thats just great :face_with_raised_eyebrow:)
Making another difficult word has no effect :pensive:
Clearing or deleting cookies has no effect but because of that It only reseted my progress :rage:(I’m mad)