Hi there!
I"m having a similar problem.
CoPro installed and was working fine. Just after updating to the last iCue version things started to get messy.
Only thing showing up is my RAM but wit a red triangle underneath it:
I have 3 fans with LED connection wich used to work fine and a H100i V2 cooler. Not showing up.
Tried everything listed above but nothing works either.
I"m using a Asus Z370-F mobo which recognizes my RAM and is able to control it..
Might be software related since it worked before last update?