I am having the same issue.
I have disinstalled:
steam
steam vr
any leap motion driver
any open vr driver
than I istakked in this order:
1) steam
2)steam vr
3) leap orion (https://developer-archive.leapmotion.com/downloads/external/v4-developer-beta/windows)
4) driver4vr
After driver4vr is installed, steam vr starts and the driver4vr menu appears.
I set leap motion as hand controller and then I click on start driver4vr.
What I see is a laser coming from my headset when driver4vr is on .
When driver4vr is off I see 2 fixed vive controllers floating
Also my hand is visible in visualiszer through leap
Can you please help us ?
Is this a problem of your driver or our problem ?