What is the problem? Please be detailed.
I couldn't start operation of ODK Briefcase. Every time I try to open ODK Briefcase, "The Java JAR file "ODK Briefcase v1.8.0 Production.jar" could not be launched." shows up. I have no idea what is going on. I downloaded JDK 9 to operate ODK Briefcase, but it seems this is not working properly.