MATLAB is selecting SOFTWARE OPENGL rendering

I have installed MATLAB R2018b on Ubuntu 18.04.1 LTS. When I open MATLAB in terminal, the following message shows up:

MATLAB is selecting SOFTWARE OPENGL rendering.

And when I close MATLAB, I get the following error in terminal:

Exception in thread "Thread-8": java.lang.NullPointerException
  at com.teamdev.jxbrowser.chromium.internal.ipc.IPC.c(Unknown Source)
  at com.teamdev.jxbrowser.chromium.internal.ipc.IPC.b(Unknown Source)
  at com.teamdev.jxbrowser.chromium.internal.ipc.IPC.a(Unknown Source)
  at com.teamdev.jxbrowser.chromium.internal.ipc.b.run(Unknown Source)
  at java.lang.Thread.run(Thread.java:748)

.Also, Help Browser doesn't work properly. It doesn't show figures, and when I search "parallel computing", MATLAB shows the following error in command window:

Exception in thread "AWT-EventQueue-0": java.lang.NullPointerException
  at com.mathworks.help.helpui.DocRoot.buildDocPageUrl(DocRoot.java:44)
  at com.mathworks.help.helpui.DocPageUrlBuilder.buildDocPageUrl(DocPageUrlBuilder.java:25)
  at com.mathworks.help.helpui.DocPageUrlBuilder.buildFileUrl(DocPageUrlBuilder.java:21)
  at com.mathworks.mlwidgets.help.LightweightHelpPanel$JsHelpPanelClientRunnable.getUrlToLoad(LightweightHelpPanel.java:224)
  at com.mathworks.mlwidgets.help.LightweightHelpPanel$JsHelpPanelClientRunnable.run(LightweightHelpPanel.java:208)
  at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
  at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
  at java.awt.EventQueue.access$500(EventQueue.java:97)
  at java.awt.EventQueue$3.run(EventQueue.java:709)
  at java.awt.EventQueue$3.run(EventQueue.java:703)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
  at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

What's the problem?

[Imaneky]

Check this: https://fr.mathworks.com/support/bugreports/details/1885601

Hope it helps!