<!--
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    "iOS: 18.0.0 -",
    "iPadOS: 18.0.0 -"
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  "documentType" : "symbol",
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  "identifier" : "/documentation/MarketplaceKit/AppLibrary/App/installationError",
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# installationError

An error that occurs during the installation of an app that resides on a marketplace.

```
@MainActor final var installationError: MarketplaceKitError? { get }
```

---

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