Fixed Null Reference Exception

[Yamosu]

Information​

When reporting a crash, stability or performance problems, please ensure that you have the files ready for submission​

[CLICK] I understand

Required​

Summary​

Null Reference Exception

Steps to reproduce​

Open the game

Expected Result​

Game loads to main menu

Actual Result​

Game crashed almost immediately after the loading bars

Game Version​

Latest

Affected Feature​

• Crash

Platform​

• Steam

Save Game​

View attachment nosave.cok

Crash Dump and Logs​

View attachment Report_2025-06-23_230913677.zip

Additional Information​

Additional Information​

Have tried no mods flag in steam, and using the launcher to launch without code mods, no change.
Attempted full re-install, no change.

Screenshot or Video​

 

[Yamosu]

I solved this in the end by deleting all the outdate files pre my re-install - including mods that Steam apparently didn't remove when I uninstalled the game and it seems the nods flag either don't work or have changed via steam, no does disabling code mods from the launcher apparently work. Bit grim really

 

[kimchanghyung]

저도같은 문제입니다.

 

[pdx_Mimonsi]

I solved this in the end by deleting all the outdate files pre my re-install - including mods that Steam apparently didn't remove when I uninstalled the game and it seems the nods flag either don't work or have changed via steam, no does disabling code mods from the launcher apparently work. Bit grim really

Thanks for providing the solution. Please be aware that uninstalling the game doesn't have any effect on save games, mods and settings, by design. Reinstalling the game is almost never needed for that reason. The flags should work in steam, but sometimes capitalization can be an issue, the flags have to be exactly correct.

 

[NotSaltyOcean2316]

I solved this in the end by deleting all the outdate files pre my re-install - including mods that Steam apparently didn't remove when I uninstalled the game and it seems the nods flag either don't work or have changed via steam, no does disabling code mods from the launcher apparently work. Bit grim really

show us the steps on how to do this please?

 

[Brh2020]

Thanks for providing the solution. Please be aware that uninstalling the game doesn't have any effect on save games, mods and settings, by design. Reinstalling the game is almost never needed for that reason. The flags should work in steam, but sometimes capitalization can be an issue, the flags have to be exactly correct.

Hello are you able to explain how to delete this outdated data.

 

[pdx_Mimonsi]

show us the steps on how to do this please?

Hello are you able to explain how to delete this outdated data.

To delete all userdata (including savegames)
1. Go to C:\Users\[your user name]\AppData\LocalLow\Colossal Order\Cities Skylines II
2. Either rename the Cities Skylines II folder or move it to another place on your computer. If you delete it be aware that your local saves will be deleted as well.
3. Start the game again, if you had corrupted files locally you should be able to get into the game now