ActiveReports 13.0 was released before Visual Studio 2019 came out. You will have to install ActiveReports 13.1 or higher to work with Visual Studio 2019.
Download and install the latest version of ActiveReports 13 from our website: https://www.grapecity.com/controls/activereports/download-version-history
Make sure that your machine supports the other requirements for ActiveReports 13: https://help.grapecity.com/activereports/webhelp/AR13/webframe.html#Requirements.html
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Evan Warren