This issue occurs if there are non-ASCII characters or corrupt folders in the datastore.
To resolve this issue you must delete the corrupt folder.
If you cannot delete the folder from the command line or the datastore browser, migrate the virtual machines from the datastore, wipe the datastore, and then recreate the datastore.
Note: You can find the corrupted folder and the corresponding datastore from the backtrace entry similar to:
] [VpxaDatastoreContext] Resolved URL sanfs://vmfs_uuid:4ce680af-0a04ae9a-692e-842b2b46cde6/ to localPath /vmfs/volumes/4ce680af-0a04ae9a-692e-842b2b46cde6/
Error: Couldn't convert invalid buffer [FDM-0903\xDC/\xEB\xF5\xFF\xF5_|0-48D1-A1DB-0B67B2C4BA88-7-55f2002-VCENTER]
Based on VMware KB 2007606