ActiveReports License is not available or has expired. Please note ActiveReports Web Designer requires Professional license. Only a licensed user may legally create or edit reports in ActiveReports Web Designer. Please report infractions or address questions to ActiveReports.Sales@grapecity.com
You will need to install the GrapeCity.ActiveReports.Aspnetcore.viewer NuGet package which includes the required assembly for licensing if you are working with .NET Core.
If you are using the web designer that targets .NET full framework, you will have to install the GrapeCity.ActiveReports.Aspnet.viewer NuGet package.