Why won’t my games download?

are both devices on Wi-Fi?

That's probably why it's taking forever, if you're doing large data transfers you need to do it wired or it will take an eternity

Thank you for your reply. I will try this, but can you tell me why all of my other games will download normally but Roblox won’t? How will resetting my router fix the issue for Roblox?

All of the solutions didn’t work, my Xbox still won’t download certain games and addons

This is a known issue with Ubisoft, you might want to head over to their support page and submit a ticket. They reported the probelm should be fixed so I would submit a ticket and get them to help you out.

try the following

Excluding profile:

It is easy to remove a Microsoft account from Xbox One console as it is not necessary to sign in to the account. See how:

Press the Xbox  button to open the dashboard.

Select System > Settings > Account > Remove Accounts.

Select the account to be removed, then select Remove to confirm.

When finished, select Close.

Clearing the cache:

Turn off your xbox, remove the source/cable from the socket and leave it like that for 2 minutes, then you can turn it on.

adding the account:

You can add your Microsoft account to any Xbox One console. See how:

Press the Xbox  button to open the dashboard.

Select your gamerpic in the top left corner of the screen, scroll down and select Add New.

Enter the email address of the Microsoft account you want to add and select Enter.

Important Do not select Get a new account unless you want to. By selecting this option, you will create a new Microsoft account. If you've forgotten the email address associated with your Microsoft account, see Lost Account Solution.

Enter the password for the Microsoft account you want to add and select Enter.

Read the Microsoft Service Agreement and Privacy Policy and select I Agree.

Follow the steps to configure Sign-in and Security Options to add your Microsoft account to your Xbox One console.