AWS EFS - Volume mount stopped working with MountVolume.SetUp failed

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Just checking if anyone experienced an issue where after having the Tech Preview EFS operator working and having AWS EFS volumes mounted and accessible in pods, the mounts just stopped working with the event message shown below.

No configurations have changed in either the operator or project / deployments / pods configs. Any thoughts on what may be causing this?

Platform: OSD 4.9 in AWS

Pod (P) eib-1-3-9-68896f78cf-chl6k Namespace (NS) calibration-test

Just now

Generated from kubelet on times in the last 0 minutes

MountVolume.SetUp failed for volume "pvc-361998f0-f4b2-420c-be93-ecc3fc8bebf8" : rpc error: code = InvalidArgument desc = Volume context property not supported