If you're having trouble streaming apps on your Xbox, there are a few things you can check to try and fix the issue.
First, make sure that your Xbox is connected to the internet. If it's not, then you won't be able to stream anything.
Next, check to see if there are any updates available for your Xbox. Sometimes streaming apps will stop working if there's a new update and you haven't installed it yet.
Finally, restart your Xbox. This will usually fix any minor issues that might be causing problems with streaming.
If none of these solutions work, then you may need to contact customer support for help.