I have a place for Social Security Number. When testing a red box says "This field can only contain numeric values" I have numbers on there. How do I

I have checked your form and seems like you were able to resolve it, it does not display any message when I tested it: 

The validation is currently set to none so there should not be any error, only when it is empty: 

However, if this is still there, please let us know and we will be glad to take other look to your form.