Basically, a method used in Gesture Manager relies on the SDK for the tool to even work in the first place. Because of this change, Gesture Manager 3.9.6 (the latest version) no longer works.
Some tools may be affected by whichever method changes GM uses. So, because of this, I highly request to change this Beta to SDK v3.10.0 instead.
This is a wake up call that big releases should no longer invoke patch version numbers. I know it’s an inconvenience for the Curated Packages, but there needs to be a better way of handling these changes. So, again, please switch 3.9.1 to 3.10.0 instead for the VRChat Dynamics for Worlds update. It’s just the right thing to do.