This will open Java Control Panel, then go to the Security tab and click on Edit Site List from the Exception Site List. Then click on Add, enter the URL, and click on Ok. Finally, close Java.

To fix the Eclipse “No Java virtual machine was found” error, simply edit the eclipse-inst.ini file and add the -vm flag, which points it to the java utility in the JDK bin directory: ...

Have you inadvertently run into Java’s ConcurrentModificationException? Don’t fret. There are a few different ways to fix the ConcurrentModificationException problem.