Need help adding prospects to a sequence on Salesloft? Check out this troubleshooting guide!

team, I am not able to add prospects to a sequence on Salesloft. Can someone please help? My table link - https://app.clay.com/workspaces/207192/tables/t_nC2m3KI1S2vl/views/gv_9Yeb2XJTUKOy