Maybe you are affected by the recent certification change in my openhab and you have to update your java version. You can find a lot of helpful answers here:
To check your java version just type java -version
on the console, version should be
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) Client VM (build 25.101-b13, mixed mode)
