I'm trying to install DNN 9.3.1.2 on Azure following this manual 'DNN as an Azure Web App' using Web App/Azure SQL, but keep getting the error message

18% Installing Database Script DotNetNuke.Data

18% ERROR occured - System.Data.SqlClient.SqlException (0x80131904): Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding.

In the beginning this happened most of the timearound 45 to 50 seconds. Later on it could run for a couple of minutes. A couple of tries later it didn't time out, but didn't show any progress.

Multiple times I have tried to upload the install files and remove the Azure SQL database, but that hasn't helped. I also let it run for half an hour or more, but no success.

Any clue what the issue is / how I could solve this?