Found something that worked for me (when the solved post of this didnt)
- Open both IK-rigs, and create a new chain (bottom right window) called “Root” and set the root of your skeleton as the start and end bone. (remember to do this on the source and target skeleton)
- Open your retargeter.
- Select the newly made chain that we just called “Root” (still bottom right window called chain mapping)
- Set “Translation Mode” to “Globally Scaled” and retarget your animations
