Subscription import fails when channel names contain non-ascii characters

[zhihengq]

Checklist

• I am able to reproduce the bug with the latest version given here: CLICK THIS LINK.
• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.
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Affected version

0.28.5

Steps to reproduce the bug

1. Subscribe to some YouTube channels that contains unicode characters such as emojis.
2. Go to "Subscriptions" -> press three dots -> "Export to" -> "File" -> Save to a file
3. Press three dots again -> "Import from" -> "Previous export" -> Select the file we just saved -> "OK"

Expected behavior

The app should show "Imported", and the channels are imported correctly.

Actual behavior

The app shows "Could not import subscriptions". No channel is imported.

Screenshots/Screen recordings

No response

Logs

No response

Affected Android/Custom ROM version

No response

Affected device model

No response

Additional information

After manually editing the saved JSON file and remove all channel entries with unicode characters, the import will succeed.

[absurdlylongusername]

@zhihengq Please give example of a channel with non-ASCII characters so this can be easily reproduced

[zhihengq]

@zhihengq Please give example of a channel with non-ASCII characters so this can be easily reproduced

For example, https://www.youtube.com/channel/UCkrEKcRUiaMkG1I3is2fhLA