This article explains the manual changes required when upgrading to Telerik Reporting R1 2018 SP3 (188.8.131.526).
REST Report Service Implementation
In all the REST Report Service implementations (WebAPI, Service Stack, ASP.NET Core), the HttpContext.Current instance is not accessible in the rendering thread. Instead the rendering thread makes use of the new property UserIdentityCurrent, which is also available in the report expression context as a global object: =UserIdentity. All the reports that rely on HttpContext.Current, must replace its usage with the new dedicated property.
WPF Report Viewer
The viewer is build with Telerik UI Controls for WPF 2018.1.220.40. If you are using a newer version consider adding binding redirects. For more information see: How to: Add report viewer to a WPF application
Silverlight Report Viewer
The viewer is build with Telerik UI Controls for Silverlight 2018.1.220.1050.
Standalone Report Designer
TRDX, TRDP and TRBP files created by the Standalone Report Designer use schema version http://schemas.telerik.com/reporting/2017/3.0.
HTML5 Report Viewer Dependencies
The HTML5 Report Viewer depends on the following libraries:
Telerik Kendo UI (2015.3.930 or later)
jQuery (1.9.1 or later)
Browser's native support for promises. When the browser does not support promises the viewer will automatically load a promise polyfill from Polyfill.io unless one is not already loaded in the application.
Angular Report Viewer Dependencies
The Angular Report Viewer depends on the following:
Angular (4.0.0 or later)
WPF Report Viewer
To connect to a REST service or Report Server instance, you have to install the Microsoft ASP.NET Web API Client v.4.0.30506 NuGet package. Installing a newer version would require upgrading the project's target framework.
WinForms Report Viewer Dependencies
If you connect to a REST service or Report Server instance, you have to install the Microsoft ASP.NET Web API Client v.4.0.30506 NuGet package. Installing a newer version would require upgrading the project's target framework.
ASP.NET WebAPI REST Report Service Dependencies
The ASP.NET WebAPI REST Report Service requires the following assemblies:
Microsoft ASP.NET Web API (4.0.20710.0 or later)
Newtonsoft.Json (184.108.40.20620 or later)
ServiceStack Report Service Dependencies
The ServiceStack Report Service uses ServiceStack (220.127.116.11):
If you are using CubeDataSource, the version of your Microsoft.AnalysisServices.AdomdClient should be 10.0.0.0 or later.
Database Cache Provider Dependencies
If you are using Database Cache Provider, the version of your Telerik Data Access ORM should be 2015.1.225.1 or later.