There may be various reasons for this.
1. Have all DNS settings been made? In the article "Link Domain with saldia" It is explained exactly which settings need to be made. If you need help or something isn't working, please contact your hosting provider."
2. Hast du die Domain im backend geändert? Es reicht nicht aus, nur die DNS-Einstellungen bei deinem Hosting anzupassen. Du musst im backend deine Domain eingeben, damit wir diese richtig verknüpfen können.
It may take a moment for the changes to go live.
If your domain is connected but your SSL certificate is not activated, you can find more information in the article "Why is my SSL certificate not working?".