The client direct backup fails with status code 83: media open error

When running a backup job, the process may fail with status code 83: media open error in the Activity Monitor.

In the Activity Monitor, you may observe the following error messages:

Error  nbpem (pid=1710263) backup of client <client_name> exited with status 83 (media open error)
end writing 
Critical bpbrm Client Direct plugin not available (2060009)
Info bpbkar (pid=0) done. status: 83: media open error

To resolve this issue, install Direct-IO plug-in on the client and run the backup job again.