missing sqlserver

[Joshivkoshi]

Hello, I need your help.
I was trying to run the script but I ran into this error message:

.\Optimize-WsusServer.ps1 : The script 'Optimize-WsusServer.ps1' cannot be run because the following modules that are s
pecified by the "#requires" statements of the script are missing: SqlServer.
At line:1 char:1

• .\Optimize-WsusServer.ps1

•   + CategoryInfo          : ResourceUnavailable: (Optimize-WsusServer.ps1:String) [], ScriptRequiresException
    + FullyQualifiedErrorId : ScriptRequiresMissingModules
  

When I check if I have sqlserver installed and ready it says yes, so Im now stuck.
Im begginer in this type of stuff so sorry if its easy to solve or even stupid to ask.

Thanks
Joshivkoshi