Current solution (for those whose engine is not crashing -_-)
How to create animation with forward solve: Creating and Modifying Control Rig | Course
Edit with additive Layers. This seams to be the solution that doesn’t break the workflow: Creating and Modifying Control Rig | Course
Bonus. I don’t like this solution to edit as much, but if it helps any one… go for it: Creating and Modifying Control Rig | Course
The “Open level sequence” option/solution. It only works for as long as the level sequencer is open (I am assuming this only works during the coding-session, when you close UE, it is gone…)
All I need to solve now… is the UE crashing -_-