Unable to install content updates on wildfire Appliance

• Content updates are failing on on wildfire Appliance
• Using "show jobs all" display the following error:

"Details:
Content cannot be installed. Decryption Error: 
*** WARNING : deprecated key derivation used. Using -iter or -pbkdf2 would be better. error writing output file Failed to determine version of wfm."

• Wildfire Appliance.
• Supported PAN-OS.
• Content Update.

1. Use "show system disk-space" to confirm the root partition being highly utilized.
2. Follow "High Disk Space Usage on / root partition and How To Clear" article.
3. if the issue continues, open a support case.