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Brh2020

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Jul 11, 2025
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Information​

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

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Required​

Summary​

Cryptographic_ Exception Error that happened.

Steps to reproduce​

This issue happened once a update rolled out where my mods were outdated which caused a Null Reference Exception so I deleted the mods and it changed to a Cryptographic_ Exception issue.

Expected Result​

I will load into the menu screen to selected my saves games and start playing.

Actual Result​

The game will give you a blue screen giving you a option to report this or exit to desktop as it crashes and you are unable to play.

Game Version​

1.3.3f1

Affected Feature​

  • Menu

Platform​

  • Steam

Save Game​

View attachment Barrier Island.cok

Crash Dump and Logs​

View attachment Report_2025-07-12_194911821.zip

Additional Information​

Screenshot or Video​

Screenshot 2025-07-12 194945.png

 
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First, let's eliminate mods, as until they are updated by their authors they can cause problems after any new game patch. Please add --disableModding to the game's Steam launch options. Then start a new test city - do you still get these crashes then?





If so, please try this: Rename the "Cities Skylines II" folder in your C:\Users\[user name]\AppData\LocalLow\Colossal Order (to whatever you want) and then start the game. To see the AppData folder you'll need to enable View Hidden Items in File Explorer.





The game will create a new clean CS2 folder and if that works it means that something in your original folder is corrupt and preventing the game from starting. Do NOT delete your original folder though as your saves are stored there and if you want to keep playing you'll need to move them over to the new fresh folder!





Let us know if that helps you. Good luck!
 
Can you please provide the player.log
Located in \AppData\LocalLow\Colossal Order\Cities Skylines II (To see the AppData folder you’ll need to enable View Hidden Items in File Explorer)
 
You see "Player" there? That's player.log - your Windows is set to hide file extensions.
 
Brh2020 said:
Sorry I was out of town so do I just have to wait for this issue to be resolved?
Click to expand...
Right now the developers are on summer break, so I can't give you an exact ETA.
You could try creating a new windows user account and see if the game works there, this has worked for some people. Please be assured your issue is very rare and you are one of the first cases where it is reliably reproducible, so we need some time to take the required measures to fix the issue.

Thank you for your understanding.
 
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