iPad mini (6th Gen) "There's a problem loading this content" error when trying to view purchased content in Apple TV app

Hi,

I have just started getting the "There's a problem loading this content" error when trying to watch purchased TV shows and movies with the Apple TV app on my brand new iPad mini 6.

This was all working fine until earlier today. I am now getting this message for no apparent reason. I've seen this error has been quite common on various devices and iOS versions.

I have tried all the following to no avail:

• Updating to iOS 15.0.1
• Updating the Apple TV app (it is up to date)
• Turning the iPad off and on again
• Hard resetting the iPad
• Connecting to a different wifi network
• Tethering to my iPhone 11 Pro
• This content is available through the Apple TV app on my iPhone 11 Pro, Apple TV 4K & MacBook Pro 16" and Xbox Series X, just not the iPad mini.
• I can view the content just fine with the iTunes app on my iPad mini, just not the Apple TV app.
• Apple TV+ content is viewable with the Apple TV app on my iPad, just not purchased content.

All other streaming apps work fine, so it is definitely not a bandwidth issue.

The only thing I haven't tried is wiping the iPad completely, and to be honest, if that's the only 'fix' I'm just going to return it for a new one, as I've only had it a week.