I do not understand what you are saying. What was wrong?
That also concerns your previous comment about the Type what you hear. Consider asking in the Trouble shooting forum instead. We do not develop the UI. Be sure to have your screenshots at hand.
Duo Lingo tells me that 'mam hladou babicku' is correct, meaning 'I have a young grandmother', but 'hlada' is slovak, I think. Czech should be mlada, no?
Duo probably rated that as a typo, it's just one letter off after all. If this was a "type what you hear" exercise, the information that you have a typo there isn't displayed.