I'm trying to play oblivion on my xbox series s but when I try yo play it asks me to...

Please try doing the power cycle procedure below as well.

Turn off your console by pressing the Xbox button  on the front of the console for about 10 seconds, until it shuts down completely.
Unplug the console's power cable. Wait 10 seconds.
Important Make sure that you wait at least 10 seconds. This step resets the power supply.
Plug the console power cable back in.
Press the Xbox button  on your console to turn it on.

Hi there. My name is Ron, I'm an independent advisor. I will be more than happy to help you.

Please try the steps below to sort out the issue.

Press the Xbox button to open the guide. ...

Select Settings.

Select System and then select Storage.

Select Clear local Xbox 360 storage.

Select Yes and restart the console.

I've done this but no luck unfortunately, now it says there isn't a secure Internet connect but when I test it, it says the Internet is all good.

I’ve used the hard drives for my Xbox one but when I bought the hard drive, it said it was compatible for the series s.

The game I bought in the Microsoft store on the Xbox one. I was trying to play it on my series s.

No, I used my 12tb western digital external hard drive but when tried to launch the game it said it needed to be on my internal ssd for faster speeds etc.

I even reached out to Xbox support on Twitter and they finally told me that I can only download the x/s version of the game if I'm playing on a Xbox series x/s.

So Microsoft/Xbox is aware that people aren't able to download the xbox one version on their series consoles when trying to play with their friends. I just don't think they care.