No message when setting IP on Network Interface

From wfc1981 (@wfc1981) via Twitter who tweets:

The customer DM’d us and confirmed that they are unable to save any change through their portal. Customer is using network interface > setting > IP address. It does not show any message after clicking the "save" option.

Tweet URL: Received through DM

Appreciate if you may be able to advise the customer on this situation.

Thanks,
@AzureSupport