MatlLeap is incompatible to the latest LeapMotion SDK (June 2018) due to its deprecation of the LeapAPI. ( https://developer.leapmotion.com/releases/leap-motion-orion-400 )
One can either update matleap to v4 or implemented the LeapCxx wrapper leapmotion provided
https://github.com/leapmotion/LeapCxx
Do you have any plans on doing so ?
If I find any time I might do a PR for the wrapper