Crash: ClassCastException in SendShareDialogDownloader when clicking send/share button #17449

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• This is a bug, not a question or an enhancement.
• I've searched for similar issues and didn't find a duplicate.
• I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
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Steps to reproduce

1. Open the Nextcloud app and open video file
2. Trigger the file sharing dialog Send/Share.
3. Select Telegram
4. The app crashes with a "Loading..." screen overlay and a stacktrace.

Expected behaviour

The file should be shared successfully without crashing the application.

Actual behaviour

The app encounters a critical ClassCastException and terminates.

Android version

11

Device brand and model

motorola one vision

Stock or custom OS?

Stock

Nextcloud android app version

340010090 (Build flavor: gplay)

Nextcloud server version

34.0.2.1

Using a reverse proxy?

Yes

Android logs

Exception in thread "main"
java.lang.ClassCastException: com.owncloud.android.ui.preview.PreviewImageActivity cannot be cast to com.owncloud.android.ui.dialog.SendShareDialog\$SendShareDialogDownloader
    at com.owncloud.android.ui.dialog.SendShareDialog.onSendButtonClick(SendShareDialog.kt:233)
    at com.owncloud.android.ui.adapter.sendButton.SendButtonAdapter\$ViewHolder.onClick(SendButtonAdapter.kt:53)

Server error logs

Additional information

No response