You need to select that vertex and bevel by vertex or – better – select all the edges and bevel by edge. You also need to adjust the weight and the segments to see it. Examples below using a destructive bevel (not modifier)
https://app.screencast.com/MLeYni5Xh6fjC?conversation=bfRFpsszK1eX03ktdovOIN
When you say it not working it’s hard to know exactly what you mean without a screenshot and your settings.
