Can't add IP address to storage account

[Tom-S-2060]

I can no longer add an IP address to a storage account networking using the portal. This started within the last week.

I get the message "Invalid argument: 'The prefix must be between 0 and 30.'." I've tried a valid IP address and CIDR notation. (71.59.0.15 or 71.59.0.15/32).

Is this a problem with the Azure portal?

[#2]

I can confirm the problem is solved. I was able to add an IP address through the Azure portal.