We are using the Elvina Pro theme and it looks like the theme’s or one of the theme’s PHP files has an undefined variable. I think our server cant load the whole file and keeps trying to, which results in a 503 error code sometimes.
The undefined variable does not result in a 503 error code. The undefined variable will break the site and you’ll get a clear message on top with a white screen. 503 error code often comes will hosting server when there is a misconfiguration or there is a load on your server.