Error with the Slider with custom handler example

[zedavid]

I've tried to use the slider with custom handler in a webpage, but I'm constantly getting an error every time I start moving the handle. I've print screened the error trace.

I can't seem to find what the problem is. I've googled about the ForwardRef component and I've tried a few things (such as this, but it didn't work out.

Does anyone have a clue what may be causing this problem?

Thanks