Difficult to see where your problem sticks , for me it's working fine , only issue I have is when I close UE4 it crashes ( without loosing anything) and I get the same error warning like in your first picture , but RL knows about it and it will be fixed with the next update.
Do you use the latest UE4 Setups from RL?
I get this information 2 days ago :
Hi all,We have fixed many crash issues in the next version of the iClone Live Link plug-in.
( Especially versions of Unreal Engine 4.24 and 4.23 )
Allen