Startup error messages and malfunction of plot

I am working on MATLAB R2018a in Ubuntu 18.04. It had been worked until yesterday, but now following error message occurs when I startup MATLAB program. Furthermore, plot function does not working. What is the problem?

com.jogamp.opengl.GLException: X11GLXDrawableFactory - Could not initialize shared resources for X11GraphicsDevice[type .x11, connection :0, unitID 0, handle 0x0, owner false, ResourceToolkitLock[obj 0x6d9982c9, isOwner false, <7f3cd1db, 389b2ff>[count 0, qsz 0, owner <NULL>]]]
  at jogamp.opengl.x11.glx.X11GLXDrawableFactory$SharedResourceImplementation.createSharedResource(X11GLXDrawableFactory.java:326)
  at jogamp.opengl.SharedResourceRunner.run(SharedResourceRunner.java:297)
  at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
  at jogamp.opengl.GLContextImpl.makeCurrent(GLContextImpl.java:688)
  at jogamp.opengl.GLContextImpl.makeCurrent(GLContextImpl.java:580)
  at jogamp.opengl.x11.glx.X11GLXDrawableFactory$SharedResourceImplementation.createSharedResource(X11GLXDrawableFactory.java:297)
  ... 2 more
Exception in thread "Startup Class Loader" java.lang.InternalError: XXX0 profile[1]: GL3bc -> profileImpl GL4bc !!! not mapped 
  at com.jogamp.opengl.GLProfile.computeProfileMap(GLProfile.java:2047)
  at com.jogamp.opengl.GLProfile.initProfilesForDeviceCritical(GLProfile.java:1917)
  at com.jogamp.opengl.GLProfile.initProfilesForDevice(GLProfile.java:1866)
  at com.jogamp.opengl.GLProfile.initProfilesForDefaultDevices(GLProfile.java:1835)
  at com.jogamp.opengl.GLProfile.access$000(GLProfile.java:79)
  at com.jogamp.opengl.GLProfile$1.run(GLProfile.java:229)
  at java.security.AccessController.doPrivileged(Native Method)
  at com.jogamp.opengl.GLProfile.initSingleton(GLProfile.java:215)
  at com.mathworks.hg.peer.JavaSceneServerPeer.initializeJOGL(JavaSceneServerPeer.java:150)
  at com.mathworks.hg.peer.JavaSceneServerPeer.<clinit>(JavaSceneServerPeer.java:120)
  at java.lang.Class.forName0(Native Method)
  at java.lang.Class.forName(Class.java:264)
  at com.mathworks.mde.desk.StartupClassLoader.loadClass(StartupClassLoader.java:241)
  at com.mathworks.mde.desk.StartupClassLoader.access$800(StartupClassLoader.java:25)
  at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:228)
  at java.lang.Thread.run(Thread.java:748)

>> x=1:100;

>> figure; plot(x)

Caught unexpected fl::except::IInternalException

Answer 1

[Walter Roberson]

See https://www.mathworks.com/matlabcentral/answers/377644-hardware-opengl-failure-on-ubuntu-16-04-3-can-not-initialize-shared-resources#answer_304403

[JooDong]

Thank you for your attention. It was partially helpful.

After following the four instructions in the link, some messages which occurs at startup are missing. However, I still have following error messages, and plot function still does not work.

Exception in thread "Startup Class Loader" java.lang.NoClassDefFoundError: com/jogamp/opengl/GLException at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.mathworks.mde.desk.StartupClassLoader.loadClass(StartupClassLoader.java:241) at com.mathworks.mde.desk.StartupClassLoader.access$800(StartupClassLoader.java:25) at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:228) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.ClassNotFoundException: com.jogamp.opengl.GLException at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 6 more

>> plot(1:100)

Caught unexpected fl::except::IInternalException

[Walter Roberson]

I would recommend creating a technical support case.