Cannot add a link on assets component in prototype

I grouped elements and saved them as a component in assets, and found that I cannot add links on that component. There should be a plus button that allow you to drag and add a link, but after I grouped them, the plus button disappeared, just as shown in the picture below, how can I fix this problem?
image

Hi @YU_LAM_sze

Interactions only work when working with a frame/auto-layout. Just turn your group into a frame :

  1. cmd+shift+G (Ctrl+shift+G for Windows) to un group

  2. then cmd+option+G (Ctrl+Alt+G for Windows) to put selection into a frame