AVDF 20.8 Notice: No message text: html.text.save_error Errno::ENOENT

Hi, may you please assist with the below error.

While pairing the dbfw with the dbav, I get the below error:

What could be the cause, and what is the solution?

Notice: No message text: html.text.save_error Errno::ENOENT

Notice: The first argument must be one of: delete, help, set, show

Notice: Supported attributes: address, avs, certificate

Notice: Failure while attempting to set: Errno::ENOENT

O/S Version

NAME="Oracle Linux Server"

VERSION="7.9"

ID="ol"

ID_LIKE="fedora"

VARIANT="Server"

VARIANT_ID="server"

VERSION_ID="7.9"

PRETTY_NAME="Oracle Linux Server 7.9"

ANSI_COLOR="0;31"

CPE_NAME="cpe:/o:oracle:linux:7:9:server"