Generating user instances in SQL Server is disabled. User sp_configure ‘user instances enabled’ to generate user instances.
To solve this issue, please follow the following steps:
1. Start the SQL Server Management Studio Express. 2. Connect to the default instance of that server (Your Machine Name\SQLEXPRESS) 3. Then open a New Query Window. Please check that you are connecting to the master database 4. Type: exec sp_configure ‘user instances enabled’, 1 5. Type: RECONFIGURE 6. Restart the SQL Server