"I do not have money now"

Is

今、お金がありません

Which is read

Ima, okane ga arimasen

However, the furigana (pronounciation guide for kanji written above or next to them phonetically in hiragana) for the kanji 今 is kon, which IS a valid way to read the kanji but not in this context, which would just be horribly confusing for people just getting to grips with kanji and a pretty common type of goof in these Duolingo lessons