My campaign I was trying to send out tonight will not allow me to see a preview of the campaign, or let me send a test message. I skipped over that and was trying to send it out anyway, and if gave me an error message. It allowed me to go through all the steps of sending a campaign, and hitting send. It gave me an error after it was sent, and did not actually send to any contacts. I have sent out multiple campaigns successfully before, and I've never had this problem. Any tips as to what might be causing it / how to fix it? TIA. Below is a screenshot of the error.
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