How to resolve the issue of not being able to open Ubuntu screen sharing.

If Ubuntu screen sharing cannot be enabled, you can try the following solutions:

1. Make sure that you have already installed a VNC server or other screen sharing tool. You can search and install a screen sharing tool that meets your needs in the Ubuntu Software Center.
2. Check if the network connection is working properly. Ensure that your network connection is stable and free from any restrictions such as firewall or network settings.
3. Check the screen sharing settings. Open the settings interface of the screen sharing tool to ensure that screen sharing is enabled and the correct access permissions are set.
4. Restart the screen sharing service. You can try restarting the VNC server or other screen sharing tools, and then try opening the screen sharing feature again.

If the above methods still cannot resolve the issue, you can try searching for relevant error information or viewing system logs to more accurately identify and address the problem. If the issue still cannot be resolved, it is recommended to try using a different screen sharing tool or contact technical support for assistance.