What's wrong here is that it only accepts the answer if you say "you pl". To my knowledge, "pl" is not a word and does not belong in any sentence. Reported.
Nvm. I didn't realize pl was short for plural. I thought it was a typo.
But also i feel like the sentence reads more like "you are staying inside?" idk
Dou makes a lot of unwarranted grammatical mistakes. Yet marks wrong correct translactions!!