Please ensure that your database is online and running and that the connection string in your connectionStrings.config file is correct.
1. Open [Install Location of Community Server]\web\connectionStrings.config
2. Within connectionStrings.config find the <connectionStrings> configuration section below:
<connectionStrings> <add name="SiteSqlServer" connectionString="[Your connection string here]" /> </connectionStrings>
3. Modify the value to properly identify your database.
For example, to connect to a database named ‘CommunityServer’ on the current machine with an account ‘csSystem’ and the password ‘pa$$word12’:
connectionString = "server=.;database=CommunityServer;uid=csSystem;pwd=pa$$word12"