Rhubarb for blender 3.01 lip sync

hi everyone, my name is john stuart guinn and i am a newcomer. i have been thru mr. yogyog’s tutorial about mb lab lip sync for blender a lot of times. i can not get it to work. i use a dell m4800 laptop with 32 gigs ram and windows 10 64 bit. am i missing something here? thanks to all.