Field not found Telerik.Reporting.Processing.UserIdentity.Current error when displaying report in ASP.NET Core application

Environment

Product Version	12.0.18.416
Product	Progress® Telerik® Reporting
.Net framework	ASP.NET Core

Description

For adding Reporting engine and Reporting REST service to .NET Core application we provide NuGet packages: Telerik.Reporting and Telerik.Reporting.Services.AspNetCore. Using those packages in the application results in an error dispalyed in HTML5 report viewer.

Error Message

Unable to get report parameters.
An error has occured.
Field not found: 'Telerik.Reporting.Processing.UserIdentity.Current'

Cause\Possible Cause(s)

It is a known issue with NuGet packages we provide for ASP.NET Core projects that was introduced in R1 2018 SP3 release.

Solution

The fix is provided in the next internal build, i.e. 12.0.18.424.

Suggested workarounds

With the current version, i.e. 12.0.18.416, the workaround for the error is to downgrade the packages.