The customer is running OpenJDK Java 11 on a Windows 10 machine.
They are getting a StringOutIndexOfBoundsException in line 805 in com.gigaspaces.start.SystemConfig.isJKD11 method.
On the customer's machine, java.version System property returned is simply "11" and this will cause the StringIndexOutOfBoundsexception.
On my machine, running Ubuntu, OpenJDK 11, java.version is reported as 11.0.5, and so it works fine.
Please see attachments for details.