Want to run gazebo through server, but gzweb is not working. How can I get gzweb working?

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Hi, I was following the instructions for installing gzweb through this link: http://gazebosim.org/tutorials?tut=gz.... Instead of installing Gazebo 7, I installed Gazebo 11 instead. I went through the whole installation and I was given this error when running gzserver --verbose:

X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 152 (GLX) Minor opcode of failed request: 3 (X_GLXCreateContext) Value in failed request: 0x0 Serial number of failed request: 26 Current serial number in output stream: 27

Because of this error, I cannot run the gui. Does anyone know what is causing me this problem?

Thanks!