I was able to send with my iPad, a message to a contact but now it indicated that number is not registered with iMessage.
Thank you for giving us the chance to assist you with your iPad. You can count on us to do our best to assist you or get you pointed in the right direction.
We understand that you are experiencing issues sending a message from your iPad.
We’d like to gather additional details that may help us be in a better position to assist you.
Does it seem to only happen with contact numbers that are not registered to iMessage?
Do you have an iPhone with an active line that is signed in to the same Apple ID that you used with your iPad?
These details can help us be in a better position to provide you assistance.
Please keep us posted.