So I used a fork of a Foxhound build script to get Bro going on my raspberry pi, and when getting into the logs noticed critical stack didn’t have it’s folder. Looked at the scripts output and saw a 404 for the critical stack install portion.
Trying to install it manually fails as well, going to their website where wget would be getting the build and it looks like they no longer have an ARM build, so did Critical Stack Intel drop ARM?
http://cstaunton.com/importing-critical-stack-intel-to-bro-on-your-raspberry-pi/