[XBSS] Sims Delivery Will Not Stay Installed

Hi there @RenasaiH,

Let's try the following steps to help with this SDX install:

First, please check that your Xbox has enough free space:

1. Press the Xbox button to open the guide.
2. Select System > Settings > System > Storage.

In the right column under Manage storage, a graphic for each drive displays the percentage of space used, the available free space, and what games, apps, or features are using storage space.

Next, let's check that you have SDX updates turned on in-game, as well as automatic updates on your Xbox:

1. From The Sims main menu, head to Game Options-> Sims Delivery
2. Press the Xbox button to open the guide.
3. Select System > Settings > System > Updates & downloads.
4. Select Keep my console up to date for console and Keep my games & apps up to date for games and apps.

We'll also want to clear your Alternate MAC Address for your console using these steps:

1. Press the Xbox button 
2. Move right to the System Tab 
3. Scroll down and select Settings  
4. Scroll down to Network  
5. Select Network Settings  
6. Scroll down and select Advanced Settings  
7. Scroll down and select Alternate MAC Address  
8. Select the Clear button 
9. Select the Restart button. 

Please let me know how this works for you!