How to fix Umbraco v9 "Boot Failed : Umbraco failed to boot, if you are the owner of the website please see the log file for more details." error
If you have started working with Umbraco v9 and done your first Azure deployment to one of your testing environments, there is a possibility that you might see the following "Boot Failed" error.
Checking the logs
In order to understand the problem, you should check the Umbarco log file.
The default location for this file is umbraco/Logs and this file contains the Machine name, along with the date information. You can reach this file via Azure's Kudu Service or alternatively, you can get download your Azure App Service's publish profile and connect your App Service via an FTP application, i.e. FileZilla. See the FileZilla screen below;