Verified on nightly build 4.6.0-0.nightly-2021-02-17-215814, installation is successful.
$ ./oc get clusterversion
NAME VERSION AVAILABLE PROGRESSING SINCE STATUS
version 4.6.0-0.nightly-2021-02-17-215814 True False 11m Cluster version is 4.6.0-0.nightly-2021-02-17-215814
$ ./oc get machineset jstuevervcsa-nwlmx-worker -n openshift-machine-api -o json| jq -r .spec.template.spec.providerSpec.value.workspace
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (OpenShift Container Platform 4.6.18 bug fix update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.