If RosterBuster is not syncing, do not wait on background sync: export CSV/iCal or copy the roster, then import into Layvr. Calendar export from Layvr is free for verified crew if you still want duties on Google or Apple Calendar. Steps: https://layvrcrew.com/blog/rosterbuster-not-working/#not-syncing
Not syncing section, Layvr vs RosterBuster, All crew answers