Found the issue! Try this:
Code:
Zone "Home"
OnTrackSelection MapSelectedTrackSendsToWidgets
OnTrackSelection MapSelectedTrackFXToWidgets
IncludedZones
"Buttons|"
IncludedZonesEnd
ZoneEnd
Zone "Buttons|"
Button1 Reaper _RS9b44c05d0259a71665cf74f20645e7373ce218e1
ZoneEnd
Zone "Send|1-8"
SelectedTrackNavigator
D| TrackSendVolume
ZoneEnd
And sorry if you saw my since deleted post.