I am getting error again and again while building apk

This is the error I am getting

Looks like a problem with your append values procedure

Have you made your app in Kodular (io.makeroid) and then exported it to App Inventor?

I made in app inventor

So the Chart is made with a makeroid extension? It may be that the extension is out of synch with the latest version of App Inventor (nb184, supporting Android 10). Did you download it in the the last few days? What does the extension developer say about it's compatibility?

I think it's from jul'19

I will try building app without the extension

Thanks.problem solved

If you get in touch with the extension developer, it's likely he/she can update it.

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