cannot add my 13 year old to my account. I get a "undefined" message

[Bbeverley8784]

Can you how to solve for the error message i am receiving?   i tried to add my 13 year old daughter to my family plan and it gives me a red line message saying 

undefined: Oops something went wrong, please try again.  i've tried several times

[Luke]

Hey @Bbeverley8784 and welcome to the Community!

Have you tried to use an incognito tab, clear the cookies of your browser and use another browser or device?

When this doesn't work, you should try to use another internet connection (e.g. cellular data instead of WiFi).

Have a nice day!

LK608