Fails to deserialize dailychallenge

Attachments:
![attachment](https://cdn.discordapp.com/attachments/741057568297975928/1508016813491884084/error_dailychallenge.txt?ex=6a140199&is=6a12b019&hm=733e6feb36f8a6e178fb134447f77631b016e0de7af7c00c93136e5718772714&)
[Original message by @themagicanimals](https://discord.com/channels/741040473476694159/741057568297975928/1508016813420843059)