Translation:The Netherlands is proud of its team.
Duo shouldn't use the word "haar" here, it's simply incorrect: https://onzetaal.nl/taaladvies/amsterdam-en-haar-zijn-grachten/
Unfortunately there's no way of reporting this other than "something else went wrong". Which I did.
tropts op zijn is correct.
Also, I get it, we're expanding our vocabulary of Dutch but can we also get some hints for words that are more commonly used like team vs ploeg.
It would be like using naderbij vs dichtbij. Sure you can say naderbij in sentences as a substitute but it's not considered the popular choice.