Try clearing the alternate MAC address with these steps:
- Go to your Xbox Settings
- Go to "Network", then "Advanced Network Settings"
- Click on "Alternate MAC Address", and then click "Clear"
Also, when you're restarting your console, modem/router, make sure you're unplugging them as I mentioned. Just restarting may not clear the cache well enough.
If neither of these work, try deleting the personal saved data for NHL 25. To do that, please follow these steps. There is the risk of losing offline saves and changes to settings you've made. Normally, those download from the cloud, but I can't guarantee this.
- Press the Guide button and then highlight the NHL 25 tile
- Hit the Menu button. It's the small one to the right of the Guide button with 3 horizontal lines on it
- Next, go to Manage game and add-ons > Saved data. Delete the file with your gamertag on it