react-tradingview-widget | React component for rendering the TradingView Advanced Real | Chart library

This is a Desktop Environment/File Manager issue. They are recognizing the file type properly but they don't execute it (as they should).

The probable cause of this issue is that the AppImage file doesn't have execution permissions (they are not preserved when the file is downloaded). The immediate solution is to ask your users to make it executable. You can achieve this by using checking the "allow execution" permission in the file properties tab of your file manager or by using the command line instruction:

chmod +x ./MyApp.AppImage.

It's also explained here https://docs.appimage.org/introduction/quickstart.html#ref-how-to-run-appimage