As the title says it asks me to drag the triangle to the right shape but it does nothing. It just continues to ask me over and over again with no reward given
Try resetting your browser zoom settings. CTRL + 0 (zero) or Cmd + 0 on Mac should do the trick.
Its not perfectly right, but the right way.
100% didnt work for me, 90% Zoom did.
maybe just play with the zoom alittle bit and it can function then.