5.2.9 remote clients not updating

Hi Team,
Have approx 220 clients that will not update, i can connect to them and it will say updating client then connect, however still shows yellow icon with arrows indicating restart required.

just downgraded to 5.2.8 and all updated fine… sucks as my maintenance ran out on the 22/5/2020 and with the current COVID-19 unable to renew atm