There is an error with your snippets.

[JakubGawel]

Hey, your button snippets are not in the order they're supposed to be. For the button, your code says btn-warning-outline when choosing a button type. The code should say btn btn-outline-warning this is the problem for your buttons.

[degouville]

major update coming this week

[JonDevOps]

was this issue ever closed?

[gooddosh]

Just installed. Still a problem for me.

[nkgokul]

Duplicate of https://github.com/degouville/atom-bootstrap4/issues/25

Calling this as duplicate of 25 as a fix is mentioned there. https://github.com/degouville/atom-bootstrap4/issues/25#issuecomment-377848555