Marvel Rivals has quickly become one of the most anticipated hero shooters, capturing the attention of comic book fans and competitive gamers alike. However, nothing kills the momentum of a high-octane match faster than a sudden crash or a disruptive notification. If you are getting Marvel Rivals error code 21, you are certainly not alone. Many players have reported this specific issue, which often prevents them from connecting to the game servers or authenticating their session. Understanding what this error entails is the first step toward getting back into the action.
What is Marvel Rivals Error Code 21?
In the world of online gaming, error codes are often cryptic, leaving players to guess whether the problem lies with their internet service provider, their local hardware, or the game's servers themselves.
When you are getting Marvel Rivals error code 21, it typically points to a connection or authentication failure.
This means the game client is struggling to establish a secure handshake with the developer's servers.
Whether it is a temporary server outage or a configuration issue on your PC, this error stops the game from launching or connecting to a match, which can be incredibly frustrating during peak gaming hours.
How to Resolve Error Code 21 in Marvel Rivals
Before you consider uninstalling the game or giving up entirely, try these proven troubleshooting steps.
These methods are designed to clear out temporary bugs and resolve local network communication issues that often trigger this error.
1. Verify Integrity of Game Files
If you are playing via a launcher like Steam or Epic Games, the most common culprit is a corrupted game file. Over time, updates can fail to install correctly, leading to missing or broken assets. To fix this:
- Open your game launcher.
- Navigate to your Library and right-click on Marvel Rivals.
- Select 'Properties' or 'Manage'.
- Look for the 'Verify Integrity of Game Files' option.
- Allow the process to complete and relaunch the game.
2. Check Your Internet Connection and DNS
Connection instability is a frequent cause for authentication errors.
A fluctuating ping or a misconfigured DNS server can often cause the game client to time out.
Try switching to a stable wired connection if you are currently on Wi-Fi.
Additionally, flushing your DNS cache can clear out outdated routing information that might be blocking your connection to the game servers.
3. Check Firewall and Antivirus Settings
Sometimes, your security software can be overzealous.
A strict firewall might mistake Marvel Rivals' server requests for malicious traffic, effectively blocking the game.
Ensure that Marvel Rivals is added to the 'Allow' list in both your Windows Firewall and any third-party antivirus software you may have running.
Disabling them temporarily—just to test if they are the source of the issue—can save you a lot of troubleshooting time.
4. Keep Your Drivers Updated
While often overlooked, outdated graphics drivers or network adapter drivers can lead to unexpected behaviors.
Ensure your GPU drivers (NVIDIA or AMD) are updated to the latest version.
Sometimes, the issue is not with the game itself, but with how your system interacts with it.
When All Else Fails: Wait for Server Maintenance
If you have tried all the steps above and are still getting Marvel Rivals error code 21, the problem might be entirely out of your hands.
During the game's launch periods or major updates, developer servers often experience heavy traffic or scheduled maintenance windows.
In such cases, the best course of action is to check the official Marvel Rivals social media channels or their community Discord server.
If there is a global outage, you will simply have to wait for the developers to apply a fix on their end.
Troubleshooting can be a tedious process, but by methodically checking your connection, verifying files, and ensuring your software is up to date, you can often solve error code 21 and return to the battlefield quickly.
Stay patient, follow these steps, and you will be back to playing your favorite heroes in no time.
Frequently Asked Questions (FAQ)
What does Marvel Rivals error code 21 mean?
Error code 21 typically indicates an authentication or connection issue, meaning your game client cannot successfully communicate with the game servers.
Is error code 21 always a problem with my PC?
Not necessarily.
While it can be caused by local network settings or corrupted files, it is frequently caused by server-side issues or scheduled maintenance that is out of the player's control.
Does reinstalling the game fix error code 21?
Reinstalling is a last resort.
Before doing that, try verifying the integrity of your game files through your launcher, as this is faster and often solves the same underlying file corruption issues.
Should I change my DNS settings to fix this error?
Changing to a public DNS, like Google's (8.8.8.8) or Cloudflare's (1.1.1.1), can sometimes resolve connectivity issues if your ISP's DNS server is struggling to route traffic to the game servers.
Written by: Grace Bennett
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