Animation BP Crash: Select 3 nodes and Unreal Crashes

When I try and Select more than one Node in the animation blueprint Unreal Crashes. I am using Bone Driven Controllers and Animation Dynamics to create joint movements. When I try and move more than one node at time it crashes

Is it my build or the file? I have tried doing this in 4.19 and 4.20 with the same file and I keep crashing. I also used paragon Feng Mao to go along with the Paragon Feature Examples: AnimDynamics | Feature Highlight | Unreal Engine [Paragon Feature Examples: AnimDynamics | Feature Highlight | Unreal Engine - YouTube] and I keep crashing

Hello,

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Thanks