iControl REST scf backup fails with a 500 error

When I make a rest call to get scf backups like so:

 

'

 

{ "command":"save", "options":[ { "file":"configfile.scf" } ] }

 

I get this

 

{'code': 500, 'message': 'Failed to append to temp tar file "/var/tmp/tmsh/vjFJF6/data" cache path "/config/filestore/files_d/Common_d/trust_certificate_d/:Common:dtca-bundle.crt_65943_5"exit code (2).\n', 'errorStack': []}

 

Executing tmsh save sys config file .scf works just fine.

 

What can I do to fix this?

 

Thanks