In order to have features and avoid problems it is now recommended to update your client to the newest available through the built in update function. At the time of writing the minimum version to have on your system is 5.4.9 (2021-03).
The Zoom portal now allows admins to enforce a minimum version of the clients that connects to meetings hosted on their accounts.
It does however not work if the client connecting is older than 4.5.4 (September 29, 2019)
Under Admin Options