Error: The report server isn’t configured properly, SSRS report deployment error.

Error:

The service is not available.

The report server isn’t configured properly. Contact your system administrator to resolve the issue. 

System administrators: The report server can’t connect to its database because it doesn’t have permission to do so. 

Solution:

Use Reporting Services Configuration Manager to update the report server database credentials.

This issue "The report server can’t connect to its database because it doesn’t have permission" might occur if the account that the report server uses to connect to the report server database is:

• Disabled or Locked.
• Its password has changed recently.
• It doesn't have owner permission on the Report Server databases (its permission has revoked).
• This Report Server account can be one of the below types:
• Windows domain user account.
• SQL Server account.
• The same service account that used to run the Power BI Report Server service.

And, you can find the current report server account login type at

Report Server Configuration Manager > Database > current report server database credential:

Update your current credential or add admin credential.