Error while using custom Mongo implementation

I'm trying to use the Mongo implementation in a project I am working on.

I'm initializing Twilight + Mongo as normal and I have created a Database object to store my collections (so I don't need to reinitialize them everytime).

- Exception: https://paste.learnspigot.com/uzufolapac.rb
- Main: https://paste.learnspigot.com/ukequvihac.kotlin
- Database: https://paste.learnspigot.com/rewezotiqu.kotlin
- Profile: https://paste.learnspigot.com/efojedifuv.kotlin
- ProfileController: https://paste.learnspigot.com/oseducerik.kotlin
- ProfileListener: https://paste.learnspigot.com/qijalufuvu.csharp

Anyone able to tell what in the world I'm doing wrong, or if this is a bug in Twilight itself? Thanks in advance.