: Many players have success by switching from Wi-Fi to mobile data, or vice-versa. A different network protocol can often bypass the download block. Clear the App Cache SimCity BuildIt Clear Cache : You can try "Offloading" the app through iPhone Storage SimCity BuildIt to clear temporary files without deleting your city. Check Device Storage : Ensure you have at least 2 GB of free space

Update your mobile device to its latest official firmware version via system settings to ensure modern network protocols run cleanly. Comparison of Solutions Troubleshooting Level Technical Risk Data Loss Danger? Minor connection drops Network Switching / VPN Regional routing blockages Clearing Cache / Offloading Corrupted local update logs Full Reinstallation Deep asset corruption Yes (If city isn't linked to Cloud) What to Do If the Error Persists

is a common connection error that prevents players from downloading mandatory additional content during the game's launch sequence. This frustrating bug locks Mayors out of their cities, presenting an error message stating "An error occurred while downloading additional materials" alongside a prompt to "Try Again" or "Exit". While the issue can stem from temporary Electronic Arts (EA) server outages, it is frequently triggered by localized network instability, corrupted app data, or device storage restrictions.

The is a terrifying wall for dedicated mayors, but it is rarely permanent. In 90% of cases, a simple cache clear or airplane mode toggle resolves the issue. In the remaining cases, the reinstall trick (using your cloud backup) will steamroll the corruption.

Go to your device settings and locate the or Device Care menu.

Corrupted cache is the #1 cause of 1100.7.

On iOS, the best method is to delete the app entirely and reinstall it to ensure all temporary data is cleared. 3. Free Up Storage Space