z3084585 (12/4/2023)
I'm having this problem too, and double-clicking doesn't help. I'm applying to the CC4 Camila. Also can't apply Perform animations; it says it can't fine the file, asks me to check if the file is there, but it is in that location.
Which motions are you having problems with? If it is the embedded motions that come with iClone 8, please try reinstalling the Animations pack to see if the problem is resolved that way.