What version of SQL Server do you have? If you have SQL 2019 you need to perform additional action like described here: https://support.kaspersky.com/KSC/13.2/en-US/92403.htm
Kaspersky Endpoint Security 11.3.0 for Windows is only compatible with Kaspersky Security Center 12. See this article: https://support.kaspersky.com/15406#block4