SharePoint configuration does not support .Net Framework 4.0. To ensure that SQL Server Setup uses .Net Framework 3.5, go ...

SharePoint configuration does not support .Net Framework 4.0. To ensure that SQL Server Setup uses .Net Framework 3.5, go to Control Panel, select Programs and Features, select Microsoft SQL Server 2016 Setup, and click Repair. Re-run Setup to install PowerPivot for SharePoint.