Issues Pushing Contacts to Instantly: Clay vs. Instantly Debate

Hi All is anyone else having issues pushing contacts into instantly, I am getting an error message for no known reason. Clay are saying its an instantly issues and instantly are saying its a clay issue… https://app.clay.com/workspaces/39601/workbooks/wb_qgtQT3YvarQH/tables/t_GDr5tbMDHyDh/views/gv_bArsF3fgovnY