Welcome Kymco Owners!
Probably best to 1st open up the cvt cover and take the bell housing off to remove the clutch assembly and have a look at it. Make sure you have some depth left on the clutch pads and check no springs are broken or loose. Also give a clean out if its dirty inside.If the clutch looks ok it may just be dirt in it and a good clean can fix it.
My clutch was not fully dis-engaging when I stopped at lights etc a while ago. I took it apart and cleaned it up and it worked fine after that. Hopefully it may work for you too.