Unable to add actions in Prototype mode

Im new to Figma, I’ve done designing a few pages but when I clicked my designed element on each page under prototype mode, it doesn’t show the dot that allows me to link to other pages.

You just need to read:

image

You haven’t got any frames here. Sections are not frames.

It’s actually because i grouped the elements… it worked after ungrouping them but somehow elements disappeared on pages that i’ve designed when i run the preview…