1. 确认使用的GetStream版本与OverlayProvider的版本是否匹配。可以通过以下命令检查：

pod outdated

2. 如果版本不匹配，更新Podfile文件中GetStream和OverlayProvider的版本，然后执行以下命令：

pod update

3. 如果版本一致，尝试将OverlayProvider从App中删除并重新添加。可以尝试使用以下命令：

pod deintegrate pod install

4. 如果以上步骤无法解决问题，可以尝试删除缓存并重新编译App。可以使用以下命令：

rm -rf ~/Library/Developer/Xcode/DerivedData/ pod install

5. 最后，检查代码中是否有其他与OverlayProvider相关的问题，并进行修复。例如，检查是否正确地初始化了OverlayProvider和是否正确处理了代理方法。

下面是使用OverlayProvider的示例代码：

import GetStream

class MyViewController: UIViewController, StreamActivityDelegate, StreamOverlayProviderDelegate { var activityFeed: StreamActivityFeed! var overlayProvider: StreamOverlayProvider!

override func viewDidLoad() {
    super.viewDidLoad()
    activityFeed = Client.shared.flatFeed(feedSlug: "myfeed", userId: "myuser")
    activityFeed.delegate = self
    overlayProvider = StreamOverlayProvider(view: view)
    overlayProvider.delegate = self
}

// StreamOverlayProviderDelegate methods
func overlayProvider(_ overlayProvider: StreamOverlayProvider, willDisplayOverlay overlay: StreamOverlay) {
    // Update UI for the given overlay
}

func overlayProvider(_ overlayProvider: StreamOverlayProvider, didDismissOverlay overlay: StreamOverlay) {
    // Handle overlay dismissal
}

// StreamActivityDelegate methods
func activityFeed(_ feed: StreamActivityFeed, didActivityAdd activities: [StreamActivity], before: StreamActivity?, after: StreamActivity?) {
    // Add overlays for new activities
    activities.forEach { activity in
        let overlay = StreamOverlay(activity: activity)
        overlayProvider.add(overlay: overlay)
    }
}

func activityFeed(_ feed: StreamActivityFeed, didActivityRemove activity: StreamActivity) {
    // Remove overlays for removed activity
    overlayProvider.overlays
        .filter { $0.activity == activity }
        .forEach { overlayProvider.remove(overlay: $0) }
}

}