Windows/Linux/Mac Eclipse plugin to compile and upload arduino sketches

On my iMac I currently use Slober 3.1 (ancient) and an even more ancient version 1.30 of Teensyduino.

I installed Sloeber 4.1 (stable) on my new MacBook Pro and the latest Java JDK 9.
That is one step ahead of what is documented on the sloeber.io website, which is 8.

I can start Sloeber and it asks for a work space directory, bu when I accept the default it responds with the error message.

The log file this error message points to is attached. Not having any java background I have no idea where to even start looking for a root cause, other than installing JDK 8, but I've installed higher java versions before and it's never been a problem.

Help is appreciated!

.log.zip (1.75 KB)