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Learn how to fix common issues with your Assetto Corsa Evo game server—from the Server Browser and passwords to configuration errors → Find out more
10 November 20264 min read1 Views0 helpful
Introduction
Is your Assetto Corsa Evo game server missing from the Server Browser, has your track suddenly changed back to Brands Hatch, or does your server no longer start after a change? Don’t worry—most issues have a simple cause. Here, we’ll show you the most common issues and how to fix them yourself quickly.
FAQ
Frequently asked questions
Check in the Overview that your server is online, and in the console that it has fully started. Search for the exact name in the Server Name field and check server_launcher.json for errors.
If server_launcher.json was empty or invalid JSON when the server started, the server recreates it with the default values. Check the file before saving, and download a copy beforehand.
Usually, SelectedSessionTypeValue has a value other than GameModeType_PRACTICE, or the value for SelectedTrackValue doesn’t match exactly. ZapX doesn’t currently support a race weekend.
ZapX rewrites the server name, passwords, ports, and player count in the file every time the server starts. Change them in the Startup Parameters section of the Configuration tab.
If the console shows a message such as Server can't be reached by UDP messages, the game backend can’t reach your server. Restart it once, and contact support if it happens again.
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Assetto Corsa Evo
Issues and solutions
The most useful tool for troubleshooting is your game server’s console. It shows what your server does when starting, whether it has logged in to the game backend, and whether it reports an error. The console is read-only for Assetto Corsa Evo.
Server Browser and connection
Server doesn’t appear in the Server Browser
Try the following:
Check in the Overview that your server is online. After starting, it may take a moment to log in and appear in the list.
Check the Console to see whether the server has started completely or stopped with an error.
Search the Server Browser for the exact name entered in the Server Name field ( Configuration tab, Startup Parameters).
If you edited server_launcher.json, check the file for errors. See “Server won’t start after a change” below.
Multiple servers with the same name in the list
Many servers use their provider’s default name. Enter a unique name for your server in the Server Name field and restart it. You’ll find it right away.
Password isn’t accepted
Set the password in the Server Password field. You’ll need to restart your server after changing it. A password entered only in server_launcher.json under DriverPassword will be overwritten with the value from ZapX the next time the server starts. Passwords are case-sensitive.
Server is full
The number of drivers who can race at the same time depends on your purchased slots. ZapX overwrites the MaxPlayers value in the file every time the server starts. If you need more slots, upgrade your server in the Overview.
Server stops shortly after starting
After starting, Assetto Corsa Evo checks whether the game backend can reach your server over the network. If it can’t, the server shuts itself down shortly afterward, and the console displays a message such as Server can't be reached by UDP messages. This isn’t caused by your configuration. Restart the server once, and contact our support team if the message appears again.
Configuration
Server won’t start after a change
This is usually caused by server_launcher.json:
If SelectedSessionTypeValue in the Event section has a value other than GameModeType_PRACTICE, the server won’t start. ZapX doesn’t currently support a race weekend. Set the value back to GameModeType_PRACTICE.
Check that the value for SelectedTrackValue exactly matches a track in the list in our Server Configuration guide, including capitalization.
Check the weather and track condition values for typos.
The console shows you what’s causing the issue when the server starts. Our Server won’t start guide explains how to read its messages and fix all known startup issues.
My track and vehicle selection have reset to the defaults
If server_launcher.json was empty or wasn’t valid JSON when the server started, your server creates it again with the default values: practice at Brands Hatch GP with all vehicles. Common causes include a missing or extra comma, a missing bracket, or a missing quotation mark.
Here’s how to avoid this:
Before making major changes, download a copy of the file from the Files tab.
Check the contents with a JSON validator before saving.
If you have a copy, upload it again and restart the server.
Changes to the name or password in the file disappear
ZapX rewrites the values for ServerName, DriverPassword, AdminPassword, TcpPort, UdpPort, HttpPort, and MaxPlayers in the file every time the server starts. That’s why you should change the name and passwords in the Startup Parameters section of the Configuration tab.
A vehicle is missing or still available after I deselect it
For each vehicle under Event → Cars, both the IsSelected and is_selected fields apply. Set them to the same value: true to allow the vehicle and false to disallow it, then restart the server. Don’t delete any entries or change the name value. You can find the complete vehicle list in our Selecting Vehicles and Balance of Performance guide.
Performance
Lag or high resource usage
Keep an eye on usage under Statistics. The more drivers racing at the same time, the more resources your server needs. If resources are running low, upgrade your server using the resource tiles in the Overview.
DDoS and other network threats
Game servers can be targeted by attacks that flood them with traffic, causing lag or disconnections. ZAP-Hosting provides built-in protection systems to protect your server against common attacks. If you suspect an attack, check the DDoS Manager and contact our support team.
Preventive measures
Regular backups can save you a lot of stress. We already back up your game server automatically every day. With the ZapX Pass, you can also create your own backups at any time and restore them with a click—with ZapX Pass Pro, you can even schedule automatic backups. Also, download your server_launcher.json from the Files tab before making major changes.
Conclusion
These steps should help you resolve your issue. If they don’t, feel free to contact our support team—we’re here for you every day and happy to help! 🙂
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