Issues with Union

Hi there, new to Figma, running into the issue pictured when unioning items.

Pictured up top is icon pre-union. Picture on bottom is icon post-union.

Here’s the link to my file. Icons are located on “Style Guide” page

the answer is you need to get rid of the stroke (outline stroke)

ctrl + shift + o

and only then use the boolean operations


Thank you so much!