Thanks for reaching out. There are no related technical issues. Make sure your Xbox firmware is updated to the latest version. Also, try restarting the device and try launching the app. Keep us posted.
Thanks for the screenshot. To help us better investigate, please login to the account experiencing the issue & send a feedback report with these steps: https://yt.be/help/feedback . You may not get a direct response, but the details will help us identify & fix issues.