"Feature: Not a JSON object:" when referencing a feature in a configured_feature JSON file

While attempting to generate a forest using the vanilla method of declaring trees as JSON objects and then referencing them using the "features:" tag and generating them that way, I encountered a pretty massive issue. it appears that configured_features JSON files cannot reference other features at all. upon loading the file, you're greeted with

"Feature: Not a JSON object:(Namespace here)"

I tested this both with my custom generation and with vanilla files with only the namespaces changed. I've tested this with custom dimensions and biomes I've known to be working perfectly before changing this issue. I will include my datapack and the configured_features file below.