We haven't got any report from today in the system. Just checked. If you mean this discussion, it does not count. A report must contain a complete sentence.
In GB English, I don't think sick is used in this context. You can say someone is off sick. But if you were to ask where Matej was, you'd be more likely to be told he is ill or not well. In this sentence, I think both ill and unwell are acceptable.
We are probably just missing this word order, which seems OK, but the sentence is already at the limits of Duolingo can do. It might happen, that we will cross those limits.
Yeah.. currently over 11,000 possible variants of this sentence in English! And we're not even accepting present perfect in the first clause or present simple in the second clause.