Telerik Reporting needs to be installed after Visual Studio. Otherwise we cannot register the report templates with Visual Studio.
Also, you need a version of Telerik Reporting which supports Visual Studio 2017. Telerik Reporting 2017 or newer is a safe bet here.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items