In the Release History for new version of AppStudio, we document “Breaking Changes”:
https://wiki.appstudio.dev/#AppStudio
We document changes to AppStudio which could cause errors in your app.
In your case, it looks like you are using a BASIC function in a JavaScript project. In Version 7, we stopped including the BASIC library in JavaScript projects. This saved some space. You can turn it back on here:
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