Have you dealt with a ‘message send failure’ to an owner?

Hi guys! I sent a pic and video to an owner this morning along with “Fido says good morning” but the message failed to send. I sent the message twice and it still didn’t go through. I thought maybe it was my phone so I sent my boyfriend a text and it went through so it’s not my phone. The dog was dropped off yesterday and a week prior, I did have a meet and greet with the owner outside their house on their front porch. Has any sitters dealt with this ’message send failure’ before? I do have an emergency number the owner provided but I don’t want to contact that number just yet because I think this is just a glitch and will text them tomorrow to see if the message fails or goes through. Please let me know your thoughts!