Scala plugin fails to resolve symbols Follow

Hi,

I've trouble getting IDEA resolve symbols in my project though the code compiles and runs fine with sbt.
I'm using IDEA 2017.3.4 with Scala plugin 2017.3.11.1.

My project can be found here:

https://github.com/marko-asplund/tech-protos/tree/feature/catdemo/deep-learning-proto

Most of the symbol resolution errors occur in NN2Breeze.

Any ideas what could be causing this?

marko