I have the problem that the mod (version v2.3.3) doesn't show trajectory predictions with FAR (version 3:0.15.11.4) installed (well, it sometimes shows them in a very buggy state during time warp).
It happens when only those two mods (and their dependencies) are installed. But when I remove FAR it works perfectly.
log file including the storm of invalid cast exceptions: https://www.dropbox.com/s/5af6cfduo06a3o6/KSP.log?dl=0