Network configuration error when i disconnect the ethernet

Hello everyone,
I want to configure my network device WLS-9163. I want the configuration to be set with both wired and wireless options. I completed this setup successfully and both are linked to the local network. After the successful completion of the setup, when I disconnect the Ethernet connection, an error window pops up on the screen which displays the network configuration error. The screenshot is attached below:
What does this error number mean?
Any idea related to the issue will be highly appreciated.
Thanks and best wishes
Judy

