I think the original version sounds better with the Bm instead of the Bbm

It's F#m... not Fm

The original recording is in the key of G. In this key, Eb minor is displayed instead of the correct E minor chord.

I have been playing this song for years, the original is in G, the original version you have here is more correct, just different key.

If you're playing on the uke, play in F or G, much easier.  G is slightly easier to play than F.