Importing from a spreadsheet does not work after upgrading to IPAM 4.3
An error similar to the following may also appear:
Unexpected Website Error
c:\inetpub\SolarWinds\Orion\IPAM\Import.upload.intro.aspx.cs(17): error CS1061: 'SolarWinds.IPAM.Web.Common.Controls.AccessCheck' does not contain a definition for 'SetGroupId' and no extension method 'SetGroupId' accepting a first argument of type 'SolarWinds.IPAM.Web.Common.Controls.AccessCheck' could be found (are you missing a using directive or an assembly reference?)
A corruption or a corrupted file in the website configuration.