Why am I getting "Positional Parameter Error" when trying to send a email from Powershell via AWS SES

We are unable to send a Email via AWS SES SMTP. DNS records have been verified SMTP credentials have been configured

We are trying to send a test email from PowerShell CLI, but when trying to do this, we are receiving a error that says: "A positional parameter cannot be found that accepts the argument"

We have also tried triggering the email through a different email client, but the email is not sending.

Can anyone provide insight as to why this error may be occurring or why emails are not being sent?