When you try to remove the missing disk from vsan disk management in vcenter it fails as it is missing. The below is to remove the missing disk via command line from the affected esxi host.
Put the host into maintenance mode do a full evacuation when doing this.
Login to you esx host via command line
Type the below make sure you use the full vSAN UUID of the absent disk
esxcli vsan storage remove -u 52dac488-fdb
You can also get the vSAN UUID from the below command
vdq -Hi
The other way to get the vSAN UUID type the below find the disk that is “unknown”
esxcli vsan storage list