Hi,
Per the error message, it means the account to create the database doesn't have the necessary permissions in SQL Server.
If the account that you use to run the configuration wizards does not have the appropriate special SQL Server role membership or access as db_owner on the databases, the configuration wizards
will not run correctly.
1. Run "SQL Server Management Studio" as administrator.
2. Open Security -> Then Logins
3. Select the account and open the account’s properties.
4. Click Server Roles and then check dbcreator and securityadmin.
Account permissions and security settings in SharePoint Servers
2016
Best regards,
Linda
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