Hello

I built fider self-hosted on docker environment, it works well.
But when I use "docker-compose logs app" to see logs,
I found it shows "server name component count invalid"

How can I fix this error?
Is that error related to "EMAIL_MAILGUN_DOMAIN"? Cos I use that in Sandbox domains.
And is necessary to fill "EMAIL_MAILGUN_API"? Thank you!