Connect line most is missing

There is simply no line connecting the notes.
No mods, no custom interfaces. Basic game. There are no lines.
I really don't know what to do anymore.

have you tried pressing the triangle button to
does it show option...and if it doesn't show text then press down button 4 times and tick that option(ggtrans)

You have to press triangle on the song select menu, and enable the connect option!!