"netsh mbn add profile" fails with "Add Profile Failure: Invalid Profile XML"

I am in the process of adding a cellular modem to a device running Windows 10 IoT Core.  I have just recently recreated the FFU I use to flash Windows IoT Core on to my device.  In the past I have used this command to add a connection profile for the cellular modem:

netsh mbn add profile interface="Cellular" name="modem_connect_profile.xml"

With my new FFU, the interface name has changed from "Cellular" to "Cellular 23" so I updated the command to be:

netsh mbn add profile interface="Cellular 23" name="modem_connect_profile.xml"

However this results in the following error:

Add Profile Failure: Invalid Profile XML

I am confident that profile XML is well-formed and correct because when I execute the following command:

netsh mbn connect interface="Cellular 23" connmode=tmp name="modem_connect_profile.xml"

I see the following output when I execute:

netsh mbn show interfaces

There is 1 interface on the system:

Name : Cellular 23
Description : CDC MBIM
GUID : {052B63C8-1DC6-41C9-88FA-2432BB374165}
Physical Address : 88:bd:98:5b:52:48
Additional PDP Context : No (Physical interface)
Parent Interface Guid : No parent
State : Connected
Device type : Mobile Broadband device is embedded in the system
Cellular class : GSM
Device Id : 358148064538692
Manufacturer : Telit
Model : CDC MBIM
Firmware Version : 20.00.005
Provider Name : Verizon
Roaming : Not roaming
Signal : 22%
RSSI / RSCP : 7 (-99 dBm)

I have read that the cause of the Add Profile Failure: Invalid Profile XML message can be due to a previous profile but when I execute:

netsh mbn show profiles

I see:

Profiles on interface Cellular 23:
-------------------------------------
<None>

What other steps can I try to get my connection profile added to my system?