Relax Brush Broken in 4.4

[RaincloudTheDragon]

I'm using Blender 4.4.3. Tested on Win11 23h2 and 24h2. Using either the Shift+R shortcut or the button on the panel, the relax brush cannot be invoked.

Python: RuntimeError: could not create instance of NODE_RELAX_OT_brush to call callback function 'invoke'

[eobet]

I think it's broken in 5.0 too unfortunately.