After Sunset Harbor Update: Cities Skylines Game isn’t Working: How to Fix?

City Skylines is one of the most popular and critically acclaimed city-building simulation game. Just a couple of weeks ago, the devs announced the Sunset Harbor DLC, which added a ton of features to the game. The new features include the fishing industry, new transportation options, and a lot more.

What causes Cities Skylines to not start after Sunset Harbor Update?

There can be two possible causes for this issue to pop up. Depending on the cause of the issue, the fix for the problem can be different. Here are the two possible causes why you can’t open the game after Sunset Harbor Update and how to check what is the cause of the issue.

If you are not able to start the game, the reason might be due to a mod issue or a game issue. So how do you check whether it is a mod issue or a game issue? Here is how:-

Open Steam
Right-click on Cities: Skylines and choose “Properties.”
Click on Set Launch Options.
Type –noWorkshop –disableMods
Press Ok

After doing this you should start the game. If you are able to start the game, then it is a mod issue. If you can’t, it is a game issue. Onto the fix now.

Also Read:- Cities Skylines Mod Compatibility Checker Tool: How to Use it?

After Sunset Harbor Update: Cities Skylines Game isn’t Working: How to Fix?

Solution 1:- Mod Issue Fix

If the issue is caused by a mod, then you must have to wait until the mod is updated. This should be done in a mere few days, usually, but you have to be patient. If you are wondering which mods have been updated and are working right now without any issues:-

81 tiles
Advanced Vehicle Options (Sunset Harbor)
Customize It Extended
Environment Changer
Extended Game Options
Extra Train Station Tracks (ETST)
Favorite Cims
Fine Road Anarchy 2
Improved Public Transport 2
Loading Screen Mod
Loading Screen Mod Test
Metro Overhaul Mod
More Asset Tags
More Network Stuff
More Vehicles
Network Extensions 2
Quay Anarchy
Real Time
Service Vehicle Selector 2
Stops and Stations
Ticket Price Customizer
TM:PE V11 STABLE
TM:PE v11.1.2 LABS
Train Converter – no longer requires Metro Overhaul Mod
Transport Lines Manager 13.2

And here are the mods which are causing issues:-

Dropouts – error, broken, remove or use replacement: Dropouts Sunset Fix
Fine Road Anarchy – old mod, no longer updated. Use replacement: Fine Road Anarchy 2
Toggleable Whiteness – tours are invisible
Traffic Manager: President Edition (STABLE) – old mod, no longer updated, use replacement: TM:PE V11 STABLE
Transport Line Rendering Fix – broken, no longer needed, remove

Not broken, but has some issues

Advanced Vehicle Options (AVO) – works, but has no options for the new DLC. Updated replacement: Advanced Vehicle Options (Sunset Harbor)
Building Panel Already Exists Icons Fix – Displays service buildings as can only be build once like unique buildings, just a UI issue, buildings can be placed several times just fine. Obsolete! The issue has been fixed, so you can just remove the mod.
Customize it – works, but missing settings for new DLC features, use Customize It Extended
Extended Building Information – works, but shows nothing for the new DLC buildings
Sub-Buildings Tabs Tabs positions are off on some of the new transport hubs.
Tree LOD Fix – error popup on launch for some people

Solution 2:- Game Issue Fix

If it is a game issue, then there is not much you can do, unfortunately. With so much variety in the PC setups of players, the developers can’t actually test on all PCs. Thus, this issue is kind of inevitable. However, to make things easier for them to fix, you can go to the forum and fill out this bug report form.

You might not receive a reply after filling out the form since the developers get a lot of responses, and it is not humanly possible for them to reply to all of them. However, rest assured the QA team is working on the issues tirelessly to make sure players get a seamless experience. If you are facing any other issue, do let us know in the comments section below, and we will be happy to help.

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After Sunset Harbor Update: Cities Skylines Game isn’t Working: How to Fix?

What causes Cities Skylines to not start after Sunset Harbor Update?

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After Sunset Harbor Update: Cities Skylines Game isn’t Working: How to Fix?

Solution 1:- Mod Issue Fix

Solution 2:- Game Issue Fix