Hello @JoseVera ,
There should be a banner in the account indicating the reason the send is disabled. Either there's an issue with the billing, or more likely since they're brand new, there's a compliance issue with the account.
If you're not seeing a banner, I'd advise either replying to the automated @ mention email you receive from my response, or calling in, so you can securely provide the username of the affected account and we can confirm the status. If your child account's owner calls in, the support agent can transfer them over to the team that would handle the account hold.
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