If you have an MVC site, you have one final step for a successful Constant Care installation.
Since you will want to run the Constant Care Checkups on the MVC site (not the admin), you will need to add the Constant Care (non-Admin) package to your MVC site.
For .Net Core 3.1:
Install-Package BizStream.KenticoToolkit.AspNetCore.WebApp.ConstantCare.KX13
For .Net Framework: Be sure to use the correct version (based on YOUR version of Kentico):
Install-Package BizStream.KenticoToolkit.ConstantCare.KX13
Install-Package BizStream.KenticoToolkit.ConstantCare.K12
Install-Package BizStream.KenticoToolkit.ConstantCare.K11
Install-Package BizStream.KenticoToolkit.ConstantCare.K10
Install-Package BizStream.KenticoToolkit.ConstantCare.K9
Install-Package BizStream.KenticoToolkit.ConstantCare.K82