Thank you for reporting this issue, we managed to reproduce it on our side. It seems that the connection string is not saved correctly in the configuration file of the .NET Core demo project during the installation of Telerik Reporting.
We will log it into our system for further investigation and improvements. Your Telerik points were updated to thank you for bringing this issue to our attention.
In order to run the project, change the connection string in application configuration file. In .NET Core projects, Reporting engine will look in the project's root app.config
for any named connection strings.
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