Offer competitive wages based on your region's average and reduce the skills required.
If your shift is a last-minute emergency you can unselect "software skills" when posting the shift so that your posting reaches as many candidates as possible. If skills aren't important, it is recommended that no skills are chosen when posting a shift so that it goes out to the maximum number of candidates.
If you haven't received any applicants for your shift, you can edit the shift details and change the hourly wage, edit required skills, and unselect software if it's not a mandatory requirement for the shift.