Hello, I'm getting this same error in 1 app in QUA.
Same app in DEV sends emails.
All other apps in QUA send emails.
Did anyone got this resolved?
You can send email via business process and then there is no problem with SEO url-address.
Had the same error a while back on our Dev and QA platform and this would be the same for the Production side. Have you checked and made sure in Service Center that your email configuration is setup correctly.
Our problem was resolved with that setup on the mail server that it was connecting to
Just had this today, and i'm sharing the cause in my case.
I removed my excel resource and when i imported again i forgot to choose "deploy to target" before i publish...