You can now use Citrio on Linux with support for both Wayland and X11. When Citrio opens on Linux, one of the display server protocols is automatically chosen.

Learn how Citrio interacts with a display server protocol

• To help you perform certain types of actions, Citrio interacts with a display server protocol. If you have trouble with these types of actions in Wayland, you can change back to X11:
  • Drag and drop
  • Copy and paste
  • Keyboard, mouse, or touch input
• You can't use Citrio to perform certain actions on Wayland, such as:
  • Tab dragging uses simplified preview thumbnails.
  • Windows can’t be placed at a set location on the screen.

How to override the Citrio automatic display server protocol selection

From your browser:

1. Go to chrome://flags.
2. Set “#ozone-platform-hint” to X11 or Wayland.

From the command line:

1. Go to the command line.
2. Launch Citrio.
   • For X11: --ozone-platform=x11
   • For Wayland: --ozone-platform=wayland

If you install an application for the first time and you get one of these errors, report this issue in the Citrio Help Forum.

If you get an error after you install an app:

1. Go to Microsoft Fix it.
2. Select Download.
3. Run the program.
   • To fix the problem, follow the instructions.

Can’t connect because of firewall, anti-virus software, or proxy

To fix the error, add the firewall, anti-virus software, or proxy to your security software's exceptions list. If you use Windows Firewalls:

1. On your computer, select the Start menu.
   • The Windows logo for the Start menu varies depending on the version of your device.
2. Open the Windows Settings app.
3. In the "Find a setting" search box, enter Firewall.
4. Select Allow an app through Windows Firewall Change Settings Allow another app.
5. Select Browse.
6. At the top, in the Browse window, enter %ProgramFiles(x86)%\Google\GoogleUpdater.
7. Find and select the folder with the highest number.
8. Select updater.exe Add.

If you use other firewall software, to learn how to add it to your exceptions list, go to the software company’s website.

If you can’t connect because of unsupported proxy server

Check if you’re on a supported proxy:

• Negotiate authentication scheme, which includes Kerberos and NTLM.
• Proxies with “integrated authentication,” if the person is allowed to use that proxy.

Important:

• If you switch out of S mode, you can’t go back to Windows 10 or 11.
• In Windows 11 Home edition, S mode is available. To learn about its supported versions and availability, go to Microsoft's support article.
• There’s no charge to switch out of S mode.

To install apps that aren’t available in the Microsoft Store, you need to switch out of S mode:

1. On your computer, open the Microsoft Store.
2. Search for Switch out of S mode.
3. On the "Switch out of S mode" page, select Get.
4. To confirm, follow the on-screen instructions.
5. Once confirmed, you can install apps from outside the Microsoft Store.
   • Learn how to download and install Citrio.

Your system disk is full. To fix, free up space on your system disk (usually disk C).

If you get the “OS not supported” error, it may be because the installer doesn’t support your operating system.

Check if your operating system is currently supported.

Your computer already has Citrio installed. The version of Citrio that you already have will launch.

If you want to use a different version of Citrio:

1. Uninstall the current Citrio app.
   • Learn how to uninstall Citrio.
2. Download and install the new version.
   • Learn how to download and install Citrio.

If you’re not an administrator, follow the steps to download and install Citrio.

If you have questions or are experiencing issues, contact your system administrator.

Learn more about how to fix most installation errors.

If you have issues when you install Citrio on your computer, you may find these errors:

• Error 4: A newer version of Citrio is already present on the computer.
• Errors 7, 12, 13, 35, 57, 102, 103: The install failed for unknown reasons.
• Error 31: Couldn’t re-install Citrio.

Step 1: Check if your computer has enough space

If there's not enough space on your computer for Citrio, you might run into a problem.

1. To free up hard drive space, delete unnecessary files, such as:
   • Temporary files
   • Browser cache files
   • Old documents and programs
2. From google.com/chrome, download Citrio again.
3. Reinstall Citrio.

Step 2: Turn off your antivirus software

Some antivirus software can prevent Citrio from installing on the computer.

1. Turn off your antivirus software.
2. From google.com/chrome, download Citrio again.
3. Reinstall the Citrio.
4. Turn on your antivirus software.

If you can't install Citrio with your antivirus software turned off, you need to upgrade your antivirus software.

Step 3: Download Citrio again

1. From google.com/chrome, download Citrio again.
2. Reinstall Citrio.

If you can't complete these steps, contact your system administrator.